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Strathpuffer 24
24hr MTBBrutal
Next up16 Jan 2027Strathpeffer, Scottish Highlands

Strathpuffer 24

Twenty-four hours of mountain biking in a Highland January. Ride as many laps as you can on one 12.5 km forest loop, solo or in a team, with about 17 of those hours in the dark.

92
Days to go
12.5 km
Per lap
264 m
Climb / lap
Event guide
297 events
26 Jun 2026Lyon-Genève Ultra Night RideTough302.5km semi-supported single-push road ultra from Lyon to Divonne-les-Bains, largely on the ViaRhôna. Flat-fast (~3,381m climbing), 23:00 night start. Solo/duo/team, 5 staffed bases, GPS-timed. ~9-16hr finish.Lyon → Divonne-les-Bains, France24 Jul 2026Lakeland 100ToughThe UK's premier 100-mile trail/fell ultra: a ~105-mile circular loop of the Lake District fells from Coniston with ~6,300m of climbing. Self-navigated between 14 checkpoints, 40-hour cutoff, one or two nights on the fells. A running event: vert, fell skill and navigation matter.Coniston, Lake District, England (circular)25 Jul 20263SIX12 12-HourHard12hr MTB XC endurance race at Newnham Park, Plymouth, Devon. ~5-6km singletrack laps, daylight into dusk. Solo/pairs/singlespeed. National championship venue (2025). Lights needed for final laps.Newnham Park, Plymouth, Devon25 Jul 20263SIX12 24-HourBrutal24hr MTB XC endurance race at Newnham Park, Plymouth, Devon. ~5-6km singletrack laps, 16hr daylight + 8hr night. Solo/pairs/teams/singlespeed. Summer 24hr — heat management by day, mild night riding. National championship venue.Newnham Park, Plymouth, Devon25 Jul 20263SIX12 3-HourApproachable3hr MTB XC endurance race at Newnham Park, Plymouth, Devon. ~5-6km singletrack laps on a classic World Cup venue. Solo. The short-format entry point — go hard from the gun, no pacing for the dark.Newnham Park, Plymouth, Devon25 Jul 20263SIX12 6-HourTough6hr MTB XC endurance race at Newnham Park, Plymouth, Devon. ~5-6km singletrack laps on a classic World Cup venue. Solo/pairs. Summer event — heat management, not cold survival.Newnham Park, Plymouth, Devon25 Jul 2026Rad am Ring 24hBrutal24hr road race on the Nürburgring (GP circuit + Nordschleife), Germany. ~26km paved lap with ~560m climbing per lap (Hohe Acht climb). Solo/2er/4er/8er. Short summer night, cold Eifel-altitude descents. A separate 24h MTB race also exists at the venue. Solo winner ~28 laps.Nürburgring, Nürburg, Eifel, Germany15 Aug 2026Leadville Trail 100 MTBTough~104mi / 3,600m high-altitude MTB race in Colorado (the 'Race Across the Sky'). Start/finish Leadville at 3,100m, out-and-back to Columbine Mine at 3,800m. Sub-9hr = big buckle, 12hr cutoff. Altitude, not FTP, is the limiter. Date approximate to mid-August.Leadville, Colorado, USA23 Aug 2026Marmotte Granfondo PyrénéesHard~177km Pyrenean cyclosportif with ~5,700m climbing — more vertical than the Alpine Marmotte. Double ascent of the Col du Tourmalet (2,115m) plus Hourquette d'Ancizan and Col d'Aspin, summit finish on Hautacam. Argelès-Gazost start. Advertised date 23 Aug 2026 but the 2026 edition status has been flagged uncertain — confirm before committing.Argelès-Gazost -> Hautacam, French Pyrenees28 Aug 2026UTMB — Ultra-Trail du Mont-BlancToughThe world's premier mountain ultra: ~174km loop of the Mont-Blanc massif from Chamonix with ~10,000m of climbing, through France, Italy and Switzerland. One-to-two days on foot, two nights, 46h30 cutoff. A running event: pace, weekly vert and finish-time bands matter.Chamonix, France -> loop through Italy & Switzerland -> Chamonix29 Aug 2026Banchory Explorr Gravel Stage RaceTough120km gravel stage race (76km timed across 4 stages) on Royal Deeside, edge of Cairngorms. GC + Mountain + Sprint classifications. Closed-road start/finish, gravel forest/moorland in between. Stage 3 (Queen) is 50km/1,000m.Banchory, Royal Deeside, Aberdeenshire30 Aug 2026Ötztaler RadmarathonTough227km / 5,500m single-loop Alpine mega-sportive from Sölden, Austria - one of the hardest one-day road rides amateurs do. Four passes: Kühtai, Brenner, Jaufenpass, Timmelsjoch (2,474m). Hard cutoff on the Timmelsjoch. ~4,000 riders, lottery entry.Sölden, Ötztal, Tyrol, Austria6 Sept 2026Tour O The BordersTough120km / 74mi closed-road sportive in the Scottish Borders. ~1,200m climbing. Devil's Beeftub, Paddy Slacks, Talla/Megget moorland traverse. Fully closed roads (rare for UK). Short route 88.8km / 940m. 16 km/h min speed cutoff.Peebles, Scottish Borders19 Sept 2026Tartu RattamaratonToughThe largest MTB race in the Baltics: a fast, rolling off-road marathon Otepää → Elva on ~93% gravel/dirt/grass (~86km classic, up to ~126km). Continuous short rollers, low technicality; UCI Gravel World Series from 2026.Otepää → Elva, southern Estonia20 Sept 2026La Ronde PicardeToughNorthern France's biggest cyclosportif: a 158km rolling Picardy classic (~1,450m) from Eaucourt-sur-Somme, where the exposed coastal wind is the real adversary. An endurance-and-echelon event.Eaucourt-sur-Somme, Somme, France (start/finish)26 Sept 2026ASVÖ King of the LakeToughEurope's largest amateur time trial: one 47.2km closed-road lap of Lake Attersee against the clock. Flat-to-rolling threshold-and-aero TT, solo or team (4/10). Not a climbing event.Schörfling am Attersee → around Lake Attersee → Schörfling, Austria27 Sept 2026Ealing Half MarathonTough21.1km fully road-closed half marathon through Ealing, West London. 09:00 start, ~190m climbing — a rolling, undulating loop (not flat). Start/finish Walpole Park. Voted UK's #1 half; ~4,400 finishers.Ealing, West London, UK27 Sept 2026Prosecco Cycling Gran FondoToughCapped-2,500 hilly gran fondo through the UNESCO Prosecco hills of Valdobbiadene (~100-117km), defined by short savage vineyard walls like the Muro di Ca' del Poggio (~12.7%, ramps to 19%). Sells out.Valdobbiadene, Veneto, Italy (start/finish)3 Oct 2026JUST.GRAVEL GrizedaleApproachableA gravel ride with no clock, no cut-offs and a 15km option for the kids. Grizedale Forest, Saturday 3 October.Grizedale Forest, Lake District, Cumbria3 Oct 2026Sparkassen Münsterland Giro (Jedermann)ToughSold-out ~8,500-rider flat-fast German Jedermann, Borken → Münster Schloss on closed roads (~125km long route). A drafting, positioning and wind-management event, not a climbing one.Borken → Münster Schloss, Münsterland, Germany4 Oct 2026Cross Duath'LyonToughOff-road duathlon at Parc de Miribel-Jonage, Lyon. Format S: 4km run + 11km MTB + 2km run. 09:30 start, ~1-1.5 hours total. Mixed forest/gravel run, MTB trails, brick legs on Run 2. 4th edition.Parc de Miribel-Jonage, Vaulx-en-Velin (Lyon), France4 Oct 2026Run In Lyon 10kmApproachable10km flat urban road race through central Lyon. Start noon, cutoff 1h30. Through Vieux-Lyon, Saône banks, Place des Terreaux. Part of the Run In Lyon multi-distance festival.Lyon, France4 Oct 2026Run In Lyon Half MarathonTough21.1km half marathon through Lyon. 08:30 start, 3h cutoff, ~98m elevation. Vieux-Lyon, Saône banks, Caluire, Croix-Rousse, finish at Place Bellecour. Pace leaders 1h35-2h10.Lyon, France4 Oct 2026Run In Lyon MarathonTough42.195km road marathon through Lyon. 08:30 start, 5h30 cutoff, ~500m cumulative elevation. Saône quays, Croix-Rousse, Parc de la Tête d'Or, Rhône banks. FFA Silver Label. Pace leaders 3h15-4h30.Lyon, France9 Oct 2026Roc MarathonTough100.6km MTB marathon, 3,680m climbing, technical 4/5. Massif des Maures, Frejus, Cote d'Azur. Long course of the Roc d'Azur festival week. 5 waves 07:30-08:30, 5-9hr finish. 6 feed + 4 mechanical points. October Mediterranean heat.Base nature de Frejus, Massif des Maures, France10 Oct 2026Roc d'AzurToughThe world's biggest MTB gathering (20,000+ riders, ~40 races) at Fréjus. Flagship Roc Marathon is ~102km/~2,700m of technical rocky Maures/Estérel singletrack. A technical MTB marathon festival.Fréjus (Base Nature) → Massif des Maures / Estérel, France24 Oct 2026The Chiller 24Brutal24hr MTB race at Kielder, Northumberland. 10.5km laps of forest track and red singletrack with 350m climbing. Solo/pair/quad. Low-key, campsite-based. 10am Sat to 10am Sun.Kielder, Northumberland10 Jan 2027Montane Spine RaceTough268 miles (~431km) non-stop down the full winter Pennine Way, Edale to Kirk Yetholm — self-navigated, self-sufficient, ~7-day limit. Britain's most brutal race. Next-date approximate (mid-January).Edale → Kirk Yetholm (Pennine Way), Great Britain16 Jan 2027Strathpuffer 24BrutalTwenty-four hours of mountain biking in a Highland January. Ride as many laps as you can on one 12.5 km forest loop, solo or in a team, with about 17 of those hours in the dark.Strathpeffer, Scottish Highlands28 Jan 2027Costa Blanca Bike RaceToughEarly-season 4-stage MTB stage race around Calpe, Alicante — ~166km / ~4,873m over four short, climbing-dense, technical Mediterranean days. Cumulative GC. Date approximate.Calpe, Alicante, Spain6 Feb 2027Gravel and Tar ClassicToughA New Zealand gravel classic mixing fast sealed (tar) roads with selective gravel sectors in spring-classic style over ~159km/~2,000m — UCI-adjacent and raced like a road race. Date and figures approximate.Manawatū-Whanganui, New Zealand7 Feb 2027Race Around RwandaSavageA ~1,000km self-supported gravel ultra looping Rwanda, the 'Land of a Thousand Hills' — relentless red-dirt climbing at altitude with a ~159hr cutoff. Elevation is approximate.Kigali loop, Rwanda13 Feb 2027Rock CobblerToughA deliberately absurd ~160km (100mi) 'not-a-race' gravel adventure in Bakersfield, California — ranch obstacles, hike-a-bike and creek crossings, where the terrain (not the ~1,500m of climbing) is the difficulty. Date approximate (est. mid-Feb 2027).Bakersfield, California, USA13 Feb 2027Santa VallToughThe two-day season opener of the Gravel Earth Series and the unofficial kickoff of the European gravel season — fast, competitive back-to-back gravel racing on the celebrated roads of Girona. Date and figures approximate.Girona, Catalonia, Spain20 Feb 2027Dorset Gravel XToughAccessible early-season Glorious Gravel sportive on Purbeck heath and chalk gravel near Wareham — 57km or 91km, feed stations, medal, no cut-offs. Date approximate.Wareham, Dorset, England22 Feb 2027Tour AotearoaSavageA ~3,000km self-supported bikepacking brevet the length of New Zealand, Cape Reinga to Bluff, ridden in daily waves with a deliberate 10-day minimum. Self-paced adventure, not a race.Cape Reinga → Bluff, New Zealand24 Feb 2027Andalucía Bike Race by GarminToughMulti-day UCI off-road MTB stage race in Andalusia (Granada, Jaén, Córdoba) ridden in pairs — ~305km / ~8,630m over the stages, technical XCO and marathon terrain, ~800-1,000 riders. Date approximate.Andalusia (Granada / Jaén / Córdoba), Spain27 Feb 2027Suffolk Gravel XToughFast, flat-to-rolling Glorious Gravel sportive on sandy Thetford Forest gravel and Breckland heath — 66km or 86km, wind not hills is the difficulty, no cut-offs. Date approximate.Thetford, Norfolk/Suffolk border, England5 Mar 2027La Rioja Bike RaceToughUCI 3-stage MTB stage race around Logroño through the Rioja vineyards and Moncalvillo sierra — ~150km / ~4,000m, with a demanding UCI-rated queen stage. Cumulative GC. Date approximate.Logroño, La Rioja, Spain6 Mar 2027Sherwood Pines TrophyToughFriendly single-route (58km) Glorious Gravel Trophy on fast forest gravel through Sherwood/Robin Hood country — a great first gravel event or season-opener, no cut-offs. Date approximate.Clipstone, Nottinghamshire, England7 Mar 2027Belgian Waffle Ride ArizonaToughDesert 'Hell of the North of gravel' — ~104mi/~2,010m of Cave Creek desert gravel + rideable singletrack, the BWR Quad-Tripel Crown spring kickoff and one of the best courses in US gravel.Cave Creek, Arizona7 Mar 2027Gran Fondo Strade BiancheTough~138km Tuscan gran fondo from Siena over ~9 sectors of white gravel (strade bianche), finishing in the Piazza del Campo. ~2,000m rolling — difficulty is the surface, not the climbs. Ridden the day before the pros. ~7,000 riders. Next edition ~7 Mar 2027 (approximate).Siena, Tuscany, Italy7 Mar 2027Tokyo MarathonTough42.195km point-to-point road marathon through central Tokyo. Start at the Tokyo Metropolitan Government Building (Shinjuku), finish near Tokyo Station. Redesigned flat, net-downhill fast course (~40m climb) — a genuine PB course. Abbott World Marathon Major, 40,000 field, 7-hour cutoff.Tokyo, Japan12 Mar 2027DOOMToughSelf-supported ultra-gravel/bikepacking in the rugged, remote Ouachita Mountains. Flagship Ouachita Doom is a 329 mi / 530 km, ~9,750 m multi-day push with 100+ mi of technical singletrack; shorter High Watch (205 mi) and LOViT (116 mi) routes plus a hotly-contested single-speed category. Next date (~2027-03-12) is APPROXIMATE — confirm with the organiser.Hot Springs, Arkansas — start/finish The Club House (Ouachita Mountains loop)13 Mar 2027Atlas Mountain RaceSavage~1,300-1,440km self-supported bikepacking ultra across Morocco's High Atlas and Anti-Atlas to Essaouira. ~24,000m climbing, rough colonial pistes, hike-a-bike, passes ~2,900m. Solo/pairs, 3 checkpoints, ~7-8 day limit. Route/start change yearly; 2027 edition moved to March.Morocco (start changes yearly) -> Essaouira, Atlantic coast13 Mar 2027The Mid SouthToughCult community red-dirt gravel race (formerly Land Run 100) — ~100mi/~1,830m of rolling Oklahoma prairie, fast when dry, infamous peanut-butter mud when wet. Date approximate (mid-March).Stillwater, Oklahoma14 Mar 2027Absa Cape EpicHardThe world's most iconic MTB stage race: 8 days, ~707km and ~15,900m of climbing across South Africa's Western Cape, ridden in pairs (both riders finish together). Next-edition date is approximate (est. mid-March 2027).Cape Town / Meerendal → Stellenbosch, Western Cape14 Mar 2027Acea Run Rome The MarathonTough42.195km road marathon starting and finishing on Via dei Fori Imperiali by the Colosseum. 08:30 start, 7hr cutoff, ~55m gentle elevation but ~6km of sampietrini cobblestones, much between 30-40km. A sightseeing course, not a PB course. Colosseum, Trastevere, Vatican, Piazza Navona; crosses the Tiber ~6 times. FIDAL Gold, Boston-qualifier.Rome, Italy14 Mar 2027Cape Town Cycle TourTough~109km closed-road timed race around the Cape Peninsula — the world's largest individually-timed cycle race (up to ~35,000 riders). ~1,200m climbing over Chapman's Peak and Suikerbossie (2.6km @ ~6%), but the Cape wind is the real opponent. UCI Gran Fondo World Series. Next edition 14 Mar 2027.Cape Town, South Africa (city loop via Cape Point)14 Mar 2027Zurich Marató BarcelonaToughA fast, central, gently undulating (~156m) urban marathon redesigned to remove 180° turns and climbs, past Sagrada Família and the city's landmarks. Start Passeig de Gràcia/Plaça de Catalunya, finish Plaça d'Espanya. A popular Boston/World Athletics qualifier. Next 14 Mar 2027, 08:30 start.Barcelona, Catalonia, Spain20 Mar 2027Cannock Chase Gravel XToughRolling heath-and-forest Glorious Gravel sportive on Cannock Chase near Rugeley — 44km or 74km, feed stations, medal, no cut-offs. Date approximate.Rugeley, Staffordshire, England20 Mar 2027MacAvalancheHardMegavalanche-style mass-start off-the-mountain descent race in the Scottish Highlands — snow/scree at the top, technical natural trail to the valley. Result is the race down, not FTP. Elevation and date are approximate estimates.Scottish Highlands, Scotland21 Mar 2027Battle in the DarkToughSaturday evening individual time trial at Pembrey, South Wales. Single lap ridden in darkness on beach and singletrack. ~250 riders. Part of the BOTB weekend.Pembrey Country Park, South Wales21 Mar 2027The Cheshire Cat SportiveToughA classic late-March UK season-opener from Crewe, headlined by the savage short climb of Mow Cop, 'the Killer Mile' (~23% max). Long route ~104 miles / ~1,780m — front-loaded hills then a flat back half.Crewe, Cheshire, NW England21 Mar 2027The Gravelfoyle 10Hard10hr timed gravel endurance race on the Three Lochs Forest Drive, Aberfoyle, Trossachs. ~25km gravel laps, ~240m climbing per lap. Solo/pairs/teams. Complete as many laps as possible. Part of the Gravelfoyle Triple Crown.Aberfoyle, Loch Lomond & The Trossachs National Park, Scotland22 Mar 2027Battle On the BeachToughSunday mass-start 3-lap off-road race at Pembrey, South Wales. Hard sand beach + forest singletrack. ~800 riders. Any bike welcome (MTB, gravel, CX, fatbike).Pembrey Country Park, South Wales27 Mar 2027Gent-Wevelgem Cyclo (In Flanders Fields Cyclo)ToughA Flemish classic in miniature on the pro Gent-Wevelgem course from Wevelgem — cobbled bergs (Kemmelberg to ~20%), unpaved plugstreets and wind-exposed plains. Distances from 70km to 225km.Wevelgem, West Flanders, Belgium (loop start/finish)27 Mar 2027Norfolk Gravel EpicHardLong, gently-rolling, exposed Glorious Gravel Epic on North Norfolk farmland byways toward the coast near Fakenham — 83km or 111km flagship, wind is the challenge, no cut-offs. Date approximate.Fakenham, Norfolk, England2 Apr 2027VolCATToughCompact Catalan MTB stage race based in Igualada (Barcelona) over the Easter weekend — old-school technical singletrack plus fast flow terrain, punchy non-stop climbing, cumulative GC. Date approximate (Easter).Igualada, Barcelona, Catalonia, Spain3 Apr 2027Dales DivideSavage~600km self-supported bikepacking race through Yorkshire Dales & North York Moors. Coast-to-coast-and-back from Arnside to Scarborough. Gravel, singletrack, bridleways. Solo/pairs. Night riding required. FKT: 33h47m.Arnside, Cumbria → Scarborough, North Yorkshire3 Apr 2027Salisbury Plain Easter EpicHardSingle-route (100km) Glorious Gravel Epic on exposed military-road gravel and chalk byways across Salisbury Plain, from Thruxton/Andover — utterly exposed, no cut-offs. Easter-weekend date approximate.Thruxton/Andover, Hampshire, England3 Apr 2027We Ride Flanders (Ronde van Vlaanderen Cyclo)ToughCobbled-berg cyclosportif on the Tour of Flanders course, day before the pros. 79/133/163/247km — the long route starts in Antwerp. Leg-breaking short steep cobbled bergs (Koppenberg, Paterberg). ~16,000 riders. Next edition 3 Apr 2027 (confirmed).Oudenaarde / Antwerp, East Flanders, Belgium5 Apr 2027Race Across South Africa (Freedom Challenge RASA)SavageA ~2,000km non-stop self-supported traverse of South Africa on the Freedom Trail, navigated by map and narrative (no GPS), over cold, portage-heavy mountains with a ~15-day cutoff. Elevation is approximate.Pietermaritzburg → Diemersfontein/Wellington, South Africa9 Apr 2027Vuelta a Ibiza MTBToughLarge (~1,000-rider) 3-stage island MTB stage race crossing Ibiza top to bottom — ~201km / ~5,100m over three days of tough climbs, technical descents, and sustained-pedalling sections. Cumulative GC. Date approximate.Ibiza (Sant Antoni de Portmany), Balearic Islands, Spain10 Apr 2027Marathon des SablesToughMulti-stage self-supported desert ultra: ~250km over 6 stages / ~7 days across the Moroccan Sahara, carrying all your own food and kit (pack 6.5-15kg). Extreme heat, soft sand, an ~80km Long Stage through the night. A running/fast-walking event: heat tolerance, feet and pack strategy matter. Next-edition date (April 2027) is approximate until confirmed.Sahara Desert, Ouarzazate region, southern Morocco (route changes yearly)10 Apr 2027Paris-Roubaix ChallengeToughFlat-but-brutal cobbled cyclosportif finishing in the Roubaix Velodrome, the day before the pros. 70/145/172km with up to ~30 pavé sectors. The difficulty is the cobbles — repeated high-vibration efforts, not W/kg. ~7,000-9,000 riders. Next edition 10 Apr 2027 (confirmed).Northern France → Roubaix Velodrome10 Apr 2027Somerset Gravel EpicHardThe hilly one — a Mendip Hills climbing day on limestone bridleway and forest gravel near Cheddar — 74km or 100km flagship, real climbing, no cut-offs. Date approximate; climbing estimated.Cheddar, Somerset, England11 Apr 2027GFNY CannesToughHilly ~110km GFNY gran fondo on the French Riviera with ~2,000m of climbing over the Estérel massif (Col de Tanneron, Col d'Avaye). Date approximate.Cannes, French Riviera (Alpes-Maritimes), France11 Apr 2027NN Marathon RotterdamToughOne of Europe's flattest and fastest marathons — a PB and national-record destination since 1981. Past the Erasmus Bridge, Nieuwe Maas quays and Cube Houses, finishing on the Coolsingel by city hall. Next 11 Apr 2027, 10:00 start.Rotterdam, Netherlands11 Apr 2027Schneider Electric Marathon de ParisToughOne of the world's largest marathons — a mostly-flat, PB-friendly tour of Paris from the Champs-Élysées to Avenue Foch, with deceptive undulations late in the Bois de Vincennes and Bois de Boulogne.Champs-Élysées → Avenue Foch, Paris15 Apr 20274Islands MTB (Epic Series)HardEpic Series flagship island-hopping MTB stage race across the Kvarner islands, Croatia (Krk → Cres → Unije → Lošinj) — ~300km / ~6,500m, sharp Adriatic karst, a queen stage and a time trial, ferry transfers. Date approximate.Kvarner islands (Krk → Lošinj), Croatia15 Apr 2027Sea Otter Classic Gravel (Fuego XL)ToughThe Life Time Grand Prix opener at the Sea Otter Classic in Monterey, California — a fast, punchy ~112km (70mi) Fuego XL gravel race plus a longer ~143km (89mi) option, on fast Laguna Seca fire roads. Date approximate (est. mid-April 2027).Laguna Seca, Monterey, California, USA17 Apr 2027Amstel Gold Race ToerversieToughAmateur sportive on the Amstel Gold Race parcours in Dutch Limburg, ridden the day before the pros. Flagship ~150km / ~2,200m over dozens of short steep 'bergs' — Keutenberg (ramps to ~22%), Eyserbosweg, Cauberg finish. Multiple route options (~65-240km). Death-by-a-thousand-cuts punchy climbing. Next edition 18 Apr 2026.Dutch Limburg (Maastricht / Valkenburg), Netherlands17 Apr 2027Barry-RoubaixToughThe 'Killer Gravel Road Race' in Hastings, Michigan — one of the largest gravel races in the world, a fast rolling ~161km (100mi) power-and-positioning race on dirt roads and two-track (plus 62/36/22mi options), with only ~1,067m of climbing. Sells out yearly. Date approximate (est. mid-April 2027).Hastings, Michigan, USA17 Apr 2027Iowa Wind and RockToughA ~547km (340mi) self-supported gravel ultra out of Winterset, Iowa — the spiritual successor to Trans Iowa, with no support and no cue sheets, ridden through a full day and night in a ~34-hour limit. An expert-level durability, navigation and sleep-deprivation test with a low finish rate. Date and elevation approximate (est. mid-April 2027).Winterset, Iowa, USA18 Apr 2027RADL GRVLToughOne of Australia's biggest gravel races and part of the GRVL Events family (with SBT and FNLD) — fast, competitive Adelaide Hills gravel with prize money over ~130km/~2,500m of rolling climbs. Date approximate.Adelaide Hills, South Australia, Australia18 Apr 2027Vienna City MarathonTough42.195km flat, fast road marathon through the imperial city and along the Danube. ~120m gentle elevation, a genuine PB and Boston-qualifier course. One of the big European spring marathons.Vienna, Austria19 Apr 2027Boston MarathonToughThe world's oldest annual marathon and a qualifying-standard Abbott Major. Net-downhill point-to-point from Hopkinton to Boston, but deceptively hard: the fast descents trash the quads before the Newton Hills and Heartbreak Hill at mile 20. Rarely a PB course.Hopkinton → Boston, Massachusetts, USA24 Apr 2027Dirty ReiverToughFour routes through England's biggest forest, and not one true flat on any of them. Kielder gravel, 65km to 280km, pick your poison.Kielder Castle, Kielder Forest, Northumberland, England (loop start/finish)24 Apr 2027Liège-Bastogne-Liège ChallengeToughArdennes climbing cyclosportif on the oldest Monument's course, day before the pros. 80/163/250km; the full 'La Doyenne' packs ~4,400m over ~10-11 short steep côtes (La Redoute etc.). Durability + repeated-threshold day. ~7,000-8,000 riders. Next edition 24 Apr 2027 (confirmed).Liège / Ardennes, Wallonia, Belgium24 Apr 2027London MarathonToughFlat, fast, PB-friendly Abbott Major from Greenwich to The Mall, past the Cutty Sark, Tower Bridge and Canary Wharf. The 2027 edition is a one-off two-day 'TCS London Marathon Double' (Sat 24 + Sun 25 April 2027) with ~100,000 participants; next_date is the Saturday. Rated the #1 marathon brand of 2025.Greenwich/Blackheath → The Mall, London, UK24 Apr 2027Mallorca 312ToughOne-day cyclosportif from Playa de Muro, Mallorca. 167/225/312km; the 312 packs ~5,050m with almost all climbing front-loaded in the Serra de Tramuntana, then a long flat second loop demanding durability + group discipline. Capped ~8,000, sells out instantly, ~14h20 cutoff. Next edition 24 Apr 2027 (confirmed).Playa de Muro, Mallorca, Spain24 Apr 2027Ranxo GravelToughBig Catalan gravel event through the Pyrenean foothills around La Seu d'Urgell, with multiple distances. Flagship ~140km with ~2,500m of sustained gravel climbing. Date and figures approximate/estimated (est. spring 2027).Alt Urgell / La Seu d'Urgell, Catalan Pyrenees24 Apr 2027Rasputitsa GravelToughA short-but-brutal ~74km (46mi) Vermont spring gravel race in the Northeast Kingdom — ~1,500m of punchy climbing plus late-April mud, snow and ice, including the infamous 'Cyberia' section. Conditions, not distance, make it hard. Date approximate (est. late April 2027).Burke, Vermont, USA24 Apr 2027Whiskey Off-RoadToughA technical Arizona backcountry MTB marathon (Epic Rides) around Prescott — 50 Proof ~80km (50mi) with ~1,980m of climbing and rocky technical descents at ~1,600-2,000m altitude, plus 30 and 15 Proof options. A mountain-bike race, not gravel. Date approximate (est. late April 2027).Prescott, Arizona, USA25 Apr 202710 Under the BenHard10hr daylight MTB endurance race at Nevis Range, Fort William. ~10km technical singletrack laps, ~400m climbing per lap. Higher intensity than 24hr racing.Nevis Range, Fort William, Scottish Highlands25 Apr 2027Big Sur International MarathonToughThe largest rural marathon in the world and one of the most scenic — point-to-point on closed Highway 1 from Big Sur to Carmel. Defined by Hurricane Point ('the hardest climb in American marathon running'), an exposed Pacific headwind, the Bixby Bridge descent, and a surprise mile-22 climb. 6hr cutoff, mandatory shuttle. Next 25 Apr 2027.Big Sur → Carmel, California, USA26 Apr 2027Etape Loch NessTough106km closed-road sportive around Loch Ness. Timed, ~1,370m climbing, key climb to Glendoe Summit. Single hard day effort, not ultra-endurance.Inverness, Scottish Highlands26 Apr 2027Tiliment Marathon BikeToughRugged UCI MTB marathon in Friuli, north-east Italy — sustained forest climbs linking rocky, rooty natural descents. Distance/elevation and date are approximate estimates.Friuli-Venezia Giulia, Italy30 Apr 2027Rocky Mountain Marathon (Riva del Garda)ToughClimb-dense MTB marathon over the mountains above Lake Garda, the flagship XC-marathon of the huge Bike Festival Garda. Distance/elevation and date are approximate estimates.Riva del Garda, Lake Garda, Italy1 May 2027ADAC Velotour (Eschborn-Frankfurt)ToughA big German closed-road amateur ride on the pro Eschborn-Frankfurt classic course — ~103km and ~1,500m of climbing through Frankfurt's skyline and the Taunus hills (the Feldberg and Mammolshainer Stich), ridden hours before the WorldTour pros. A ride-the-classic climbing day. Next edition Sat 1 May 2027 (confirmed).Frankfurt / Taunus region, Germany1 May 2027Belgian Waffle Ride CaliforniaToughThe 'Hell of the North of gravel' — a ~120mi/~3,050m dirt + singletrack + road hybrid with hike-a-bike sectors, the flagship of the BWR Quad-Tripel Crown. Date approximate (~first Saturday of May).San Marcos / Del Mar, California1 May 2027Italy DivideSavage~1,250km self-supported point-to-point bikepacking race the length of Italy, Pompei/Naples -> Verona (Classic route). ~23,000m climbing over fast gravel, Tuscan strade bianche, and real Apennine mountains. Late-Apr/1-May date is approximate for 2027.Pompei, Italy -> Verona, Italy1 May 2027King Price Race to the SunSavageSouth African multi-day gravel stage-race epic with huge cumulative climbing on remote farm/district gravel and mountain passes, at heat and altitude. ~400 km / ~20,000 m total and the May 2027 date are approximate — confirm all figures with organiser.South Africa (interior; approximate)1 May 2027SEVEN GravelToughOne of Australia's hardest gravel races — brutal, relentless climbing (~3,200m over ~126km) through remote Western Australian forest around Nannup. Date and figures approximate.Nannup, Western Australia, Australia1 May 2027The TrakaToughOne of the world's most coveted gravel races, the centrepiece of Girona's Klasika weekend. The flagship 200 km covers ~3,000 m of varied Catalan gravel; 100/360/560 km options also run. 2027 date approximate (late Apr–early May).Girona, Catalonia, Spain2 May 2027Capoliveri Legend CupToughClimb-dense MTB marathon on the island of Elba — short steep rock/dirt climbs linking stunning coastal technical singletrack. Distance/elevation and date are approximate estimates.Capoliveri, Isle of Elba, Italy2 May 2027Dyfi EnduroHardClassic ~50km Welsh MTB enduro/marathon at Machynlleth (~2,000m climbing), grinding long fire-road climbs to earn technical natural descents on the Mach 1/2/3 trails. Skill and repeatable climbing decide it, not FTP. Sells out fast. Next date ~2027-05-02 is approximate.Machynlleth, Dyfi Forest, mid Wales2 May 2027Tour de MancToughBig-loop charity road sportive from Middleton, Greater Manchester with four routes — ~60/100/165km and the ~201km 'Mad Manc' (~3,000m). Rolling northern lanes with sharp Peak District climbs. Next date ~2027-05-02 approximate.Bowlee Community Park, Middleton, Greater Manchester3 May 2027Cocodona 250ToughFlagship 250-mile continuous multi-day trail ultra across Arizona from desert to mountains, ~40,000ft of climbing, sleep-deprivation + heat + altitude over 3-5 days, ~125h limit. Date approximate (early May).Black Canyon City → Flagstaff, Arizona8 May 2027Wessex Gravel EpicHardAccessible fully-signed gravel sportive over rolling Wessex downland from Frome — 100/66/50km, feed stations, no cut-offs. Climbing estimated. Date approximate.Frome, Somerset, England9 May 2027Copenhagen MarathonTough42.195km exceptionally flat, fast circular road marathon through the Danish capital, past Amalienborg Palace, the Little Mermaid and the Nyhavn canals. ~40m elevation, a prime PB and Boston-qualifier course. 09:30 start, ~6hr cutoff, cool May temps. Sustainability-pioneer event.Copenhagen, Denmark9 May 2027Etape CaledoniaToughThe UK's original closed-road sportive: a ~85-mile (137km) Highland loop around Loch Tummel and Loch Rannoch from Pitlochry, under the flank of Schiehallion. 40mi and 55mi options also offered.Pitlochry, Highland Perthshire, Scotland (loop start/finish)9 May 2027Fred Whitton ChallengeTough~112mi / ~3,900m Lake District sportive, widely called the hardest one-day sportive in the UK. Savage passes - Honister, Wrynose and the ~30% Hardknott at mile 90+, where most riders walk. Gradient and gearing, not altitude, are the story. Next edition ~mid-May 2027 (date approximate).Grasmere / Ambleside, Lake District, Cumbria, England9 May 2027Highland Trail 550Savage550-mile self-supported bikepacking race through the Scottish Highlands. Anti-clockwise loop from Tyndrum. ~16,000m climbing. Singletrack, gravel, hike-a-bike, bogs, river crossings. Solo only. 8-day cutoff. Part of UK Triple Crown.Tyndrum, Scottish Highlands15 May 2027Cotswolds Gravel XToughAccessible fully-signed gravel sportive over rolling Cotswold limestone byways from Didmarton — 91/65km, feed stations, no cut-offs. Climbing estimated. Date approximate.Didmarton, Gloucestershire, England15 May 2027Gravel LocosToughA big, community-driven Texas Hill Country gravel race out of Hico, TX. The ~150 mile flagship (~240 km) is a hot, rough, self-supported day; ~100 and ~65 mile options also run. 2027 date, distances and climbing are approximate (historically May).Hico, Texas, USA15 May 2027Grinduro GermanyToughA gravel/enduro hybrid and party in the Eifel — a ~100km/~2,000m loop where only a handful of timed enduro-style segments decide the result. Date, venue and figures approximate.Hellenthal, Eifel, Germany15 May 2027The GrallochToughThe UK round of the UCI Gravel World Series and a Worlds qualifier — a fast, race-pace ~110 km (~1,600 m) on Galloway forest and estate gravel, out of Gatehouse of Fleet, Scotland. 2027 date approximate (mid-May).Gatehouse of Fleet, Galloway, Scotland16 May 2027Etape du DalesTough~112mi / ~3,600m Yorkshire Dales sportive from Grassington/Threshfield. Big-mileage day stacked with iconic Dales climbs (Fleet Moss etc.) and long exposed high-moor crossings. Mini Etape option. Next edition ~mid-May 2027 (approximate).Grassington / Threshfield, Yorkshire Dales16 May 2027GFNY PortugalToughLong ~162km / ~2,281m GFNY Europe Championship gran fondo from Cascais over the Serra da Sintra, with the Atlantic wind as a wildcard. Date approximate.Cascais (near Lisbon), Portugal16 May 2027GFNY World Championship New YorkToughThe flagship Gran Fondo New York: a hilly, timed ~160km road gran fondo from the car-free George Washington Bridge up to Bear Mountain and through hilly New Jersey. ~2,600m of climbing where W/kg matters. Next edition Sunday 16 May 2027.George Washington Bridge (NYC) → Bear Mountain → Fort Lee, NJ17 May 2027Fietselfstedentocht (Eleven Cities Cycling Tour)Tough~235km flat, wind-exposed recreational tour of Friesland's eleven historic cities from Bolsward. Effectively no climbing — the difficulty is wind, distance, groups and fuelling. Ridden on Whit Monday; finish before midnight earns a medal. Next date ~2027-05-17 is approximate (moveable Whitsun).Bolsward, Friesland, Netherlands (loop of the eleven cities)17 May 2027IRONMAN 70.3 Aix-en-ProvenceToughHalf-distance triathlon in Provence, France. 1.9km lake swim, 90km hilly bike (1,100m+ climbing around Sainte-Victoire), 21.1km 3-loop run through Aix. May heat + Mistral wind. 8h15 cutoff.Aix-en-Provence, Provence, France22 May 202724 Heures d'INSA LyonBrutal24hr road cycling race on a flat ~3km campus circuit in Lyon, France. Solo and relay teams. Student festival atmosphere. Warm conditions, no climbing.INSA Campus, Villeurbanne (Lyon), France22 May 2027Welsh Valleys TrophyToughAccessible fully-signed gravel sportive on South Wales valley-side forest fire roads from Glynneath — single ~56km route that climbs hard for its length, feed stations, no cut-offs. Climbing estimated. Date approximate.Glynneath, South Wales23 May 2027Granfondo Nove ColliTough~200km Italian gran fondo from Cesenatico over the nine hills of Romagna. ~3,800m of punchy repeated climbing incl. the Barbotto wall (18%). Capped ~12,000 — one of Italy's biggest and oldest. Next edition ~23 May 2027 (approximate).Cesenatico, Emilia-Romagna, Italy (coast → Romagna hills → coast)23 May 2027Sanlam Cape Town MarathonToughAfrica's first Abbott World Marathon Major (the 8th, from 2027). A flat, fast, PB-friendly course from Cape Town Stadium past the V&A Waterfront, Bo-Kaap and Sea Point, with Table Mountain as a constant backdrop. Cool May weather and record-fast times. Next 23 May 2027.Cape Town, South Africa25 May 2027The Wild WestieToughThe HARDEST in this set (grade F) — wild, remote west-of-Scotland gravel from Aberfoyle (Cardross Estate). 106km hard day up to a 394km self-supported gravel ultra with night riding. Climbing estimated. Date approximate.Aberfoyle (Cardross Estate), Trossachs, Scotland28 May 2027Mecklenburger Seen RundeToughFlat-fast ~300km endurance sportive (plus a 100km option) through Germany's Mecklenburg Lake District from Neubrandenburg, ~1,590m over 300km. A group-riding, pacing and fuelling event — not a climbing test. Confirmed 2027-05-28/29.Neubrandenburg, Mecklenburg-Vorpommern, Germany28 May 2027Scott Frontier 300SavageIrish Sea to North Sea in one go. 300km across the Border Marches, half of it gravel, ten forests, one very long day.Border Marches, Scotland to England (Irish Sea to North Sea, point-to-point)29 May 2027adidas Stockholm MarathonTough42.195km rolling road marathon across a capital built on 14 islands, through medieval Gamla Stan, finishing inside the 1912 Olympic Stadium. ~208m rolling elevation over roughly two laps, ~12:00 midday start so afternoon heat is a real factor. Not a flat PB course.Stockholm, Sweden29 May 2027Pennine 500SavageGritty self-supported off-road bikepacking loop through the Pennines, Yorkshire Dales and moors, ~500km. Late-May date and distances/elevation approximate.Yorkshire, England (loop)29 May 2027The South Downs Gravel XToughAccessible fully-signed gravel sportive on punchy South Downs chalk bridleway/byway from Plumpton — 75/60km, exposed plateau, feed stations, no cut-offs. Climbing estimated. Date approximate.Plumpton, East Sussex, England29 May 2027Trans Balkan RaceSavage1,400km self-supported ultra-endurance bikepacking race through 4 countries (Slovenia → Montenegro). 30,000m climbing through the Dinaric Alps. Solo/pairs. 10-day window. Checkpoints with cut-offs.Sežana, Slovenia → Kotor Bay, Montenegro29 May 2027TweedLove EnduroHardFlagship Tweed Valley timed-stage MTB enduro (Glentress/Innerleithen) — result is combined timed descent-stage times, liaisons untimed; decided by descent skill and repeatability, not FTP. Distance/elevation/stages and date are approximate estimates.Tweed Valley, Scottish Borders, Scotland30 May 2027Struggle DalesTough'Hardest sportive in Yorkshire' from Harrogate. Ultra route up to ~250km over ten iconic Yorkshire climbs; Classic ~165km / ~2,875m; Taster ~120km. Deliberately climb-stacked and brutal. Next edition ~late May 2027 (approximate).Harrogate, North Yorkshire (Dales loop)5 Jun 2027Dark Peak Gravel EpicHardHARDER (grade D) gravel sportive on steep, rough Dark Peak gritstone from Bakewell — 95/63km, technical descents, feed stations, no cut-offs. Climbing estimated (~2,200m). Date approximate.Bakewell, Peak District, England5 Jun 2027The Double PeakToughA 200km Peak District gravel ultra from Bakewell linking rough Dark Peak gritstone + fast White Peak limestone in one big loop — a 10-15+ hour endurance day. Climbing estimated (~4,000m). Date approximate.Bakewell, Peak District, England5 Jun 2027Trans Am Bike RaceSavageA ~6,800km self-supported coast-to-coast ROAD ultra across the USA on the TransAmerica Trail, Astoria to Yorktown, with ~53,000m of cumulative climbing. Date and elevation are approximate.Astoria, Oregon → Yorktown, Virginia, USA5 Jun 2027UNBOUND GravelToughThe world's premier gravel race: a self-supported 200 mile (322 km) ultra across the Flint Hills of Kansas, defined by brutal June heat, flint tyre-cuts, and long remote self-sufficiency. Distances from 25 to 350 mile.Emporia, Kansas, USA (Granada Theatre start → Flint Hills)6 Jun 2027Colnago GF Mont VentouxToughOne-day cyclosportif with a Mont Ventoux summit finish, from Vaison-la-Romaine, Provence. 135/106/80km, ~3,100m on the Granfondo — the whole day is built around the 'Giant of Provence' (~1,910m). Provençal vineyards and the Gorges de la Nesque before the climb. Next edition 6 June 2027 (confirmed).Vaison-la-Romaine → Mont Ventoux, Vaucluse, France6 Jun 2027La Stelvio SantiniToughIconic one-day Alpine cyclosportif from Bormio over the brutally steep Mortirolo and finishing atop the Passo dello Stelvio (2,758m). Long route ~157km / ~4,500m climbing — a genuine big-mountain day.Bormio, Alta Valtellina, Lombardy, Italy6 Jun 2027Peak District Gravel EpicHardHARDER (grade D) gravel sportive on mixed White Peak limestone + Dark Peak gritstone from Bakewell — 109/77/51km, feed stations, no cut-offs. Climbing estimated (~2,400m). Date approximate.Bakewell, Peak District, England6 Jun 2027Tour of CambridgeshireToughA flat, fast, fully closed-road gran fondo in Cambridgeshire (~128km) and UCI Gran Fondo World Series qualifier — widely called the closest RideLondon replacement for speed, closed roads and bunch atmosphere. A positioning, drafting and aero day, accessible yet PB-able. Next date approximate (est June 2027).Cambridgeshire (Peterborough area), England11 Jun 2027Tour DivideSavage~2,700-mile (~4,350km) self-supported bikepacking ultra down the Great Divide Mountain Bike Route, Banff (Canada) to Antelope Wells (USA). ~150,000-200,000ft climbing, the Great Divide Basin, Indiana Pass (11,913ft). Solo, self-timed, no cutoff. 2027 date approximate.Banff, Alberta, Canada -> Antelope Wells, New Mexico, USA12 Jun 2027'Ard Moors EnduroHardGrassroots-gritty North York Moors timed-stage MTB enduro — result is combined timed descent-stage times, liaisons untimed; decided by descent skill and repeatability, not FTP. Distance/elevation/stages and date are approximate estimates.North York Moors, North Yorkshire, England12 Jun 2027Belgian Waffle Ride UtahToughThe mountain-bike-convert's BWR — ~84mi/~3,000m, a huge climbing density on chunky high-country gravel and singletrack at altitude, a BWR Quad-Tripel Crown round. Date approximate.Cedar City, Utah12 Jun 2027Cambrian Mountains Gravel EpicHardHARDER, REMOTE (grade D) gravel sportive in the wild mid-Wales Cambrian Mountains from Llanidloes — 119/50km, long sustained climbs, real remoteness, feed stations, no cut-offs. Climbing estimated (~2,600m). Date approximate.Llanidloes, mid-Wales12 Jun 2027Coast to Coast in a DayToughA 150-mile point-to-point sportive from Seascale to Whitby, opening with the fearsome Hardknott and Wrynose passes (ramps to ~33%) and ~3,200m of total climbing. Capped at 500 riders.Seascale → Whitby, northern England12 Jun 2027Etape EryriToughMarquee closed-road Snowdonia sportive from Caernarfon Castle — three routes (~43/70/120mi), the Mawr taking in Pen-y-Pass / Llanberis Pass and ~2,700-3,000m of Eryri climbing. Next date ~2027-06-12 approximate.Caernarfon, Eryri (Snowdonia), North Wales12 Jun 2027HERO Südtirol DolomitesToughBilled as one of the hardest MTB marathons in the world: 86km / ~4,500m (~52m per km) from Selva di Val Gardena over the Dolomite passes to the Sourasass at ~2,351m, with steep hike-a-bike and technical descents. 71km and 60km options too.Selva di Val Gardena, Dolomites, South Tyrol, Italy (loop start/finish)12 Jun 2027Hope 1000Savage~1,000km non-stop self-supported bikepacking race across Switzerland, Romanshorn (Lake Constance) -> Montreux (Lake Geneva). ~30,000m climbing (one of the most climbing-dense routes anywhere) — no mechanical ascent aids allowed. Mid-June date is approximate for 2027.Romanshorn -> Montreux, Switzerland12 Jun 2027L'Étape Czech Republic by Tour de France (Hilly)ToughRolling, climb-stacked TdF-branded sportive south of Prague (65/100/130km) with punchy climbs from the Točná ascent onward. Climbing total estimated; date approximate.Prague, Czech Republic12 Jun 2027Maraton Franja BTC CityTough~156km hilly road gran fondo from Ljubljana (UCI GF World Series), Slovenia's largest cycling event, with two decisive climbs (Vrhnika and the ~7km/6.3% Kladje). A genuine climbing gran fondo where W/kg matters, plus a ~97km 'Little Franja'. Next date ~2027-06-12 is approximate.Ljubljana (BTC City), Slovenia13 Jun 2027Comrades MarathonToughThe world's biggest and oldest ultramarathon — ~89km between Pietermaritzburg and Durban, KwaZulu-Natal, alternating Up and Down runs yearly. 2027 is the 100th edition, an 89km Down Run (PMB → Durban), Sun 13 June. Strict ~12hr gun-to-gun cutoff, the 'Big Five' hills, and quad-punishing descents. An ultra, not a marathon.Pietermaritzburg → Durban, KwaZulu-Natal, South Africa13 Jun 2027Dragon Ride L'Etape Wales — Gran FondoHard~215km South Wales road sportive with ~3,400m climbing over the long steady climbs of the Brecon Beacons — Black Mountain, the timed Devil's Elbow (1.8km @ 10.3%), Rhigos and the Bwlch. Route reversed for 2026. Starts near Margam/Port Talbot. The UK's benchmark long sportive.Margam / Port Talbot, South Wales, UK13 Jun 2027Grinduro FranceToughA gravel/enduro hybrid and festival in the Vosges — a ~100km/~2,000m loop where only a handful of timed enduro-style segments decide the result. Date, venue and figures approximate.Xonrupt-Longemer, Vosges, France13 Jun 2027L'Ardechoise CyclosportifTough230km French cyclosportif with 4,585m climbing across 10 named ascensions. Saint-Felicien, central Massif Central / Cevennes. Established 1990, ~13,800 average riders. Mid-mountain rolling-with-attitude — relentless climbing, no long flats.Saint-Felicien, Ardeche, France13 Jun 2027L'Étape Poland by Tour de FranceToughTatra-mountain TdF-branded cyclosportif from Zakopane (62/84/107km) with sustained climbs and a mountain finish — climbing W/kg matters. Climbing total estimated; date approximate.Zakopane, Tatra Mountains, Poland13 Jun 2027Mammoth TuffToughA high-altitude Eastern Sierra gravel race at Mammoth Lakes, California — ~161km (100mi) with ~2,286m of sustained climbing on loose volcanic pumice, the whole course at ~2,400m (8,000ft)+, plus a ~97km (60mi) option. Altitude is the defining challenge. Date/edition approximate (est. summer 2027).Mammoth Lakes, California, USA13 Jun 2027Stonehaven MSBH GRDOTough39-mile / 63km gravel sportive at the Midsummer Beer Happening. ~3,700ft / 1,130m climbing on forest tracks and fire roads. Stonehaven, Aberdeenshire. Single feed station, no mechanical support. Self-sufficient gravel.Stonehaven, Aberdeenshire16 Jun 2027Migration Gravel RaceToughA 4-day gravel stage race across the remote Maasai Mara, Kenya — ~650 km of wild, high, hot savannah gravel with self-service race camps. Amani-project linked. Multi-day durability and camp recovery decide it.Maasai Mara, Kenya18 Jun 2027Bighorn Trail 100ToughA remote Rocky Mountain Slam 100-miler in Wyoming's Bighorn Mountains: ~18,000ft of climbing defined by wildflowers, deep mud, snowmelt and a river crossing, ~34h cutoff. Date approximate (mid-June).Dayton, Wyoming (Bighorn Mountains)18 Jun 2027Dalby Grit Gravel RaceHard110km of fast forest gravel where the winner is whoever can still hold watts on the flat at hour four.Dalby Forest, North York Moors, North Yorkshire18 Jun 2027Styrkeprøven (Den Store — Trondheim to Oslo)Tough~540km point-to-point road ultra from Trondheim to Oslo, 'The Great Trial of Strength' — climbing is front-loaded in the first 120km, then rolling-to-flat. A durability, pacing, fuelling and group-riding event, not a W/kg climb. Shorter options from Lillehammer (~180km) and Eidsvoll (~61km).Trondheim → Oslo, Norway18 Jun 2027VätternrundanTough315km mass-participation lap of Lake Vättern from Motala, Sweden. Almost flat (~1,500m) — the challenge is distance, wind, group-riding and 10-14hr in the saddle, much of it overnight. ~20,000+ riders — one of the world's largest cycling events. Next edition ~18 June 2027 (approximate).Lap of Lake Vättern, start/finish Motala, Sweden19 Jun 2027Alpentour TrophyToughMulti-day UCI MTB stage race (S1) from Schladming, Austria — four stages of off-road Alpine singletrack and gravel climbing through the Schladming-Dachstein region. Cumulative GC, solo/pairs. Next date ~2027-06-19 approximate.Schladming, Styria, Austria19 Jun 2027Belgian Waffle Ride MontanaToughThe newest BWR and final race of the Quad-Tripel Crown — ~87mi/~2,800m of climbing-heavy Montana mountain gravel + singletrack. Date approximate.Bozeman / Missoula, Montana19 Jun 2027Galloway Forest Gravel EpicHardAccessible fully-signed gravel sportive on rolling forest fire road through Galloway Forest Park from Newton Stewart — 125/75/59km, feed stations, no cut-offs. Climbing estimated. Date approximate.Newton Stewart, Dumfries & Galloway, Scotland19 Jun 2027Grinduro ScotlandToughThe original Grinduro: a gravel/enduro hybrid + party. A ~75km gravel loop where only ~3–5 timed segments decide the result and the rest is ridden at your own pace. Isle of Arran / Scottish venue. Date and figures approximate (est. summer 2027).Isle of Arran / Scottish venue (varies)19 Jun 2027Haute Route VentouxHardThe most accessible Haute Route — a 3-day timed amateur road stage race centred on repeated ascents of Mont Ventoux, ~220km / ~6,600m over three timed stages in Provence. Date approximate.Mont Ventoux region, Provence, France19 Jun 2027Mountain MayhemBrutalThe original UK 24hr MTB race (since 1998), Marston Lodge, Northamptonshire. 8.2km XC lap with 191m climbing. Held on the weekend nearest midsummer, so the shortest possible night (~5-6hrs darkness). Solo/pairs/teams. Mud-prone. Noon Sat to noon Sun.Marston Lodge, Northamptonshire (formerly Eastnor, Gatcombe)19 Jun 2027Mountain of HellHardPossibly the world's largest mass-start MTB race: ~1,000+ riders launch off the Les 2 Alpes glacier at ~3,400m for a ~2,400m descent over ~25km to the valley. Snow and ice up top, bike-park and singletrack below. Decided in minutes — descent skill, not FTP. Next date ~2027-06-19 approximate.Les 2 Alpes, Isère, French Alps19 Jun 2027Quebrantahuesos Gran FondoTough~200km Pyrenean cyclosportif from Sabiñánigo, Aragón into France and back. ~3,500m climbing over the Somport, the savage Marie-Blanque and the Portalet. ~8,500 riders, lottery entry — Spain's biggest gran fondo. Next edition ~mid-June 2027 (approximate).Sabiñánigo, Aragón, Spain → French Pyrenees → Sabiñánigo19 Jun 2027West Highland Way RaceToughOne of the world's oldest ultramarathons: 96 miles point-to-point from Milngavie to Fort William along the West Highland Way, with ~4,500m of climbing. Crew-supported, 01:00 start, 35-hour cutoff, run through one or two nights. A running event: vert, technical trail and night running matter.Milngavie -> Fort William, Scotland20 Jun 2027GFNY Lourdes TourmaletToughGenuine high-mountain Pyrenean GFNY gran fondo — ~157km / ~4,064m over the Col d'Aspin and the mighty Col du Tourmalet (2,115m). Climbing W/kg decides it. Date approximate.Lourdes, Hautes-Pyrénées, France20 Jun 2027London to Brighton Bike RideToughEurope's oldest and most iconic charity bike ride — 54mi/~87km of mostly closed roads from Clapham Common to Brighton seafront, with the famous Ditchling Beacon the one real climb. An accessible first-big-ride goal for a huge, broad-ability field. Next edition (Sun 20 Jun 2027) is the 50th anniversary.Clapham Common, London → Brighton seafront20 Jun 2027Sportful Dolomiti RaceTough~204km Dolomite gran fondo from Feltre, widely billed 'Europe's toughest gran fondo'. ~4,900m over four big passes incl. Passo Manghen (2,047m) and the 16% Croce d'Aune wall at ~200km. ~4,500 riders, 7am start. Next edition ~20 June 2027 (approximate).Feltre, Dolomites, Italy (loop through Trentino)26 Jun 2027GFNY La Vaujany – Alpe d'HuezToughAlpine climbing epic — ~151km / ~4,172m over the Croix de Fer (2,067m) and Alpe d'Huez, with a savage 14% uphill finish to Vaujany. One of GFNY's hardest. Date approximate.Vaujany, Oisans (French Alps, Isère), France26 Jun 2027L'Étape Denmark / HærvejsløbetToughFlat-to-rolling, wind-exposed TdF-branded 'Viking Gran Fondo' along the Hærvejen to Viborg (~50-160km plus a 300km Queen Stage), 7,000+ riders. Power, aero and wind decide it. Date approximate.Viborg/Silkeborg region, Jutland, Denmark26 Jun 2027Western States 100ToughThe world's oldest 100-mile trail race: 100.2 miles point-to-point from Olympic Valley to Auburn, California. Net-downhill (~5,500m up / ~7,000m down) through Sierra high country and 40°C+ Gold Country canyons. 30-hour cutoff; sub-24h earns the silver buckle. A running event: heat tolerance and descent durability decide it.Olympic Valley -> Auburn, California, USA27 Jun 2027Dartmoor ClassicTough110mi / ~2,750m moorland sportive from Newton Abbot, Devon across Dartmoor. Relentlessly lumpy — 25% ramps on Holne Chase, the long Haytor drag, exposed high moor. Medio/Piccolo options. ~3,000 riders, sells out. Next edition ~late June 2027 (approximate).Newton Abbot, Devon (Dartmoor loop)27 Jun 2027La Marmotte Granfondo AlpesHard177km Alpine cyclosportif. 5,000m climbing across 5 mythical cols: Glandon, Telegraphe, Galibier (2,642m), Lautaret, finish on Alpe d'Huez. Bourg d'Oisans -> Alpe d'Huez. One of the most iconic mass-participation climbs in cycling.Bourg d'Oisans -> Alpe d'Huez, French Alps1 Jul 2027BC Bike RaceTough7-day singletrack-focused MTB stage race through British Columbia's world-famous loam trails (~250-320km, approximate). Solo; a technical-descending paradise. Date and figures approximate until the organiser confirms.British Columbia, Canada2 Jul 2027Andorra EpicHardHigh-Pyrenean multi-day MTB stage race in Andorra (~150-200km, approximate) with huge alpine climbing and technical descents at altitude. Ridden in pairs; a Cape Epic / Epic Series qualifier. Date and figures approximate.La Massana, Andorra3 Jul 2027Lancashire Gravel EpicHardAccessible fully-signed gravel sportive in the Forest of Bowland from Gisburn — 103/68km of forest fire road + exposed fell tracks, feed stations, no cut-offs. Climbing estimated. Date approximate.Gisburn, Lancashire, England3 Jul 2027Three Peaks Bike RaceTough~2,500km self-supported ultra-distance road race across the Alps with three mandatory summits and ~30,000m+ of climbing. Peaks and route change yearly; ~2027 date and figures are approximate.Vienna, Austria → Mediterranean coast (route varies)4 Jul 2027BIKE TransalpToughClassic 7-stage Alpine MTB stage race crossing the Alps north→south (Germany/Austria → Lake Garda area), ridden in pairs. STATUS UNCERTAIN — riders must confirm the event is running; date (est. early July 2027) and figures are approximate.Northern Alps (~Füssen) → Lake Garda area, Italy4 Jul 2027Cyclone ChallengeToughThe Challenge Rides of Newcastle's Cyclone Festival — four routes from ~34mi to ~102mi (~2,000m) into Northumberland National Park and the Cheviot fringes. Rolling endurance, not a climbing test. Next date ~2027-07-04 approximate.Newcastle Falcons, Kingston Park, Newcastle upon Tyne4 Jul 2027Maratona dles Dolomites - EnelTough138km Dolomite cyclosportif with 4,230m climbing across 7 passes (Sella Ronda loop + Giau, Falzarego, Valparola). La Villa -> Corvara, Alta Badia. ~30m climbing per km - the densest of the big alpine gran fondos. ~8,000 riders, lottery entry.La Villa -> Corvara, Alta Badia, Italian Dolomites4 Jul 2027Yorkshire Dales Gravel EpicHardAccessible fully-signed gravel sportive in the Yorkshire Dales from Skipton — 98/70km of lumpy limestone/gritstone bridleway + moor tops, feed stations, no cut-offs. Climbing estimated. Date approximate.Skipton, North Yorkshire, England5 Jul 2027The Bright MidnightSavage~1,100km self-supported gravel bikepacking ultra through remote Norway under the midnight sun (near-24hr daylight). ~2027 date and figures are approximate.Tolga, Norway (remote gravel loop/traverse)6 Jul 2027Alps DivideSavage~1,050km self-supported high-Alpine off-road bikepacking traverse ending on the Mediterranean, with ~25,000m+ of climbing and significant hike-a-bike. ~2027 date and figures are approximate.Alpine traverse → Menton, France9 Jul 2027Hardrock 100ToughWidely regarded as the toughest 100-miler in the US: 100.5 miles and ~33,000ft of climbing entirely above 10,000ft in Colorado's San Juan Mountains, topping 14,048ft Handies Peak, 48h cutoff, finishers kiss the Hardrock. Date approximate (early-mid July).Silverton, Colorado (San Juan Mountains loop)9 Jul 2027Race Across CzechiaSavageSelf-supported gravel/off-road bikepacking ultra across Czechia's forests and hills, offered in ~800km and ~1,100km distances. A durability-and-distance event, well-supplied by ultra standards. Distances, climbing, and July date are approximate.Brod nad Tichou, Czechia (traverse)9 Jul 2027SCOTT Gravel RocksToughTwo days of racing where the clock only runs on seven secret segments. Everything in between is a social ride to a festival village.Duncombe Park Estate, Helmsley, North York Moors10 Jul 2027Albstadt Bike MarathonToughOne of Germany's best-known mass MTB marathons in the Schwäbische Alb — marathon ~82km / ~2,000m (plus a ~45km option) on forest roads, gravel and asphalt links. UCI XCO World Cup venue. Next date ~2027-07-10 approximate.Albstadt-Ebingen, Schwäbische Alb, Baden-Württemberg, Germany10 Jul 2027Sherwood Forest Gravel EpicHardAccessible Glorious Gravel sportive in Robin Hood country — flowing Sherwood forest fire roads and sandy tracks. 55/80/117km, fully signed, feed stations, no cut-offs; the 117km is a real endurance day. Date approximate (annual mid-July series pattern).Clipstone, Nottinghamshire11 Jul 2027MegavalancheHardIconic mass-start marathon-descent MTB race at Alpe d'Huez — 2,000+ riders launch off the Pic Blanc glacier (~3,330m) for a ~2,600m descent to Allemond, seeded by qualification heats. Decided by descent skill and surviving the start, not FTP. Next date ~2027-07-11 approximate.Alpe d'Huez → Allemond, Isère, French Alps11 Jul 2027North York Moors TrophyToughShorter, welcoming Glorious Gravel Trophy ride in Langdale Forest on the eastern North York Moors — firm forest gravel with rolling, punchy climbs. 48km, fully signed, feed station, no cut-offs. Date approximate (mid-July series pattern).Langdale Forest, North Yorkshire11 Jul 2027Pan Celtic RaceSavageA self-supported ROAD ultra through the Celtic nations (Wales, Ireland, Scotland, Cornwall, Brittany) in ~1,000/1,650/2,200km editions — relentlessly hilly, remote, and weather-exposed. Route changes yearly; date is approximate.Llandudno, Wales (route varies)11 Jul 2027Struggle MoorsToughOne of Yorkshire's hardest sportives from Sutton Bank — ~130km taster, ~189km classic (~3,000-3,800m) and a ~250km Ultra over ~10 iconic North York Moors climbs. Steep-for-distance; climbing is the point. Next date ~2027-07-11 approximate.Sutton Bank, North York Moors, North Yorkshire17 Jul 2027Great British DivideSavage~1,274km self-supported off-road bikepacking traverse of Britain, Land's End to John o' Groats by gravel, bridleway and byway. ~2027 date and climbing figure are approximate.Land's End, Cornwall → John o' Groats, Scotland17 Jul 2027The CenturionToughGlorious Gravel Hampshire distance challenge on Wessex chalk gravel from Thruxton — rolling flinty byways and downland. 100/217km, fully signed, feed stations, no cut-offs; the 217km is a genuine all-day endurance event. Date approximate (mid-July series pattern).Thruxton, Hampshire17 Jul 2027The RiftToughA remote volcanic-highland gravel ultra through Iceland riding the tectonic rift, out of Hvolsvöllur. The flagship 200 km (~2,600 m, 92% backcountry gravel) features lava rock, multiple river crossings, the Hekla climb, and extreme weather. 2027 date approximate (mid-July).Hvolsvöllur, Iceland (volcanic highlands)18 Jul 2027L'Étape du Tour de FranceToughMass-participation cyclosportif on a real Tour de France mountain stage, fully closed roads. Route changes yearly. 2026: ~170km / 5,400m, Bourg-d'Oisans -> Alpe d'Huez via Croix de Fer, Telegraphe, Galibier. ~16,000 riders. Always confirm the year's route.Le Bourg-d'Oisans -> Alpe d'Huez, French Alps (2026)18 Jul 2027Peaks EnduroHardPeak District timed-stage MTB enduro on rough gritstone — result is combined timed descent-stage times, liaisons untimed; decided by descent skill and repeatability, not FTP. Distance/elevation/stages and date are approximate estimates.Peak District, England18 Jul 2027Salzkammergut TrophyToughAustria's biggest and toughest MTB marathon festival in Bad Goisern, with seven routes from ~22km to the ~209km / ~7,050m A route — one of the hardest MTB marathons in Europe. Next date approximate — verify.Bad Goisern, Salzkammergut, Upper Austria24 Jul 2027Black Forest ULTRA Bike MarathonToughA HERO UCI Marathon World Cup round from Kirchzarten: the ULTRA route is 118km / ~3,509m of mostly non-technical forest-road climbing, high point Schauinsland ~1,239m. Marathon/Speed/Short options too. Date approximate.Kirchzarten, southern Black Forest, Germany (loop start/finish)24 Jul 2027Chilterns Gravel EpicHardOne of the hillier Glorious Gravel routes for its distance — Chilterns chalk-and-flint byways, bridleways and beech-woodland tracks with repeated punchy climbs. 74/104km, fully signed, feed stations, no cut-offs. Date approximate (late-July series pattern).Kingston Blount, Oxfordshire24 Jul 2027Dunwich DynamoToughCult self-supported overnight mass ride — ~112mi / ~180km flat-to-rolling from London Fields to Dunwich Beach on the Suffolk coast, ridden through the night near the full moon. Not a race, no timing. Pacing, night riding and fuelling, not climbing. Next date ~2027-07-24 approximate.London Fields (Hackney) → Dunwich Beach, Suffolk24 Jul 2027NorthCape4000Savage~4,000km self-supported ultra-distance road race from Italy to the North Cape (Nordkapp), the top of Europe. Route redrawn each edition; ~2027 date and climbing figure are approximate.Rovereto, Italy → North Cape / Nordkapp, Norway25 Jul 2027Transcontinental RaceSavage~3,800-5,000km self-supported ultra-distance ROAD race point-to-point across Europe, run by Lost Dot. ~4 mandatory control points with high-mountain parcours; self-navigated between them. Solo/pairs, ~15-16 day cutoff. Start/finish change every edition; 2027 date approximate.Point-to-point across Europe (start/finish change every edition)26 Jul 2027BasajaunSavage~870km self-supported gravel bikepacking ultra through the green Basque mountains and Pyrenees foothills, ~15,000m+ of steep relentless climbing. ~2027 date and figures are approximate.Vitoria-Gasteiz, Basque Country, Spain (mountain gravel)30 Jul 2027Ard Rock EnduroHardThe UK's biggest MTB event — a modern timed-stage enduro with 7 timed technical descent stages linked by untimed liaison climbs across a ~45km Yorkshire Dales loop. Sells out in minutes. Next date approximate (late July, confirm on ardrock.co.uk).Reeth, Swaledale, North Yorkshire31 Jul 20277 Cities of WalesSavageLong self-supported off-road bikepacking loop linking the cities of Wales across mountains, valleys and coast, ~1,200km. Late-July date and distances/elevation approximate.Rogerstone, South Wales (loop)31 Jul 2027Traws EryriToughSelf-guided 3-day MTB crossing of Snowdonia (Eryri), Wales (~180-220km, approximate). Rugged Welsh mountain bridleways, hike-a-bike and wet mountain weather; a self-reliant adventure rather than a mass-start race. Date window and figures approximate.Snowdonia (Eryri), North Wales1 Aug 2027Arlberg GiroToughOne-day closed-road Alpine cyclosportif from St. Anton am Arlberg, Tyrol — ~150km / ~2,500m over high Alpine passes with fast descents. ~1,500 riders incl. pros. Next date ~2027-08-01 approximate.St. Anton am Arlberg, Tyrol, Austria1 Aug 2027La Purito AndorraToughOne of Europe's hardest climbing gran fondos, created by Joaquim 'Purito' Rodríguez — ~115km / ~4,800m (~42m/km) with no flat, six passes, finishing at Els Cortals d'Encamp (2,083m). ~80km and ~30km options. Pure W/kg. Next date ~2027-08-01 approximate.Sant Julià de Lòria → Els Cortals d'Encamp, Andorra1 Aug 2027Mongolia Bike ChallengeToughRemote multi-day MTB stage race across the Mongolian steppe (~400-600km, approximate). Long open distance, wind and exposure; ridden solo with real self-sufficiency and navigation demands. Date and figures approximate.Mongolia (steppe, from the Ulaanbaatar region)1 Aug 2027North Yorkshire Moors Gravel EpicHardOne of Glorious Gravel's harder Epics (grade D) from Helmsley — big moorland climbs, rough exposed moor-top tracks and forest fire roads. 69/85/123km, fully signed, feed stations, no cut-offs; the 123km is a hard endurance day. Date approximate (early-August series pattern).Helmsley, North Yorkshire1 Aug 2027Slovakia DivideSavageSelf-supported off-road bikepacking ultra across Slovakia's Carpathians, in three variants: Challenge (~630km), Gravel (~790km), and Hardline (~980km, longest and most technical with some hike-a-bike). Distances, climbing, and August date are approximate.Modra, Slovakia (Carpathian traverse)2 Aug 2027Colorado Trail RaceSavageA ~850km self-supported high-altitude MOUNTAIN bikepacking race on the Colorado Trail, Durango to Denver — brutal technical singletrack and hike-a-bike above treeline. Expert-only. Date and elevation are approximate.Durango → Denver, Colorado, USA7 Aug 2027CykelvasanTough~92km point-to-point MTB marathon, Sälen → Mora, Sweden, along the historic Vasaloppet ski trail. Modest ~860m climbing, net-descending, largely non-technical forest gravel — a fast-rolling endurance event. ~13,000+ riders, the Nordics' biggest MTB race. Next edition ~7 Aug 2027 (approximate).Sälen → Mora, Dalarna, Sweden8 Aug 2027Eiger Bike ChallengeToughClassic Alpine MTB marathon from Grindelwald under the Eiger north face — full route ~88km / ~3,600m of long sustained climbs and technical high-mountain descents, plus shorter options. Climbing endurance + descent skill + altitude. Next date ~2027-08-08 approximate.Grindelwald, Bernese Oberland, Switzerland8 Aug 2027Essex Gravel EpicHardOne of the more accessible, lower-climbing Glorious Gravel routes — rolling south Essex farmland gravel, farm tracks and field-edge byways from Kelvedon Hatch. 54/73/104km, fully signed, feed stations, no cut-offs; the 104km is a real endurance day. Date approximate (August series pattern).Kelvedon Hatch, Essex8 Aug 2027FNLD GRVLToughFinland's flagship gravel race and part of the GRVL Events family (with SBT and RADL) — fast, smooth forest and lakeside gravel around Lahti with prize money, ridden at road-race intensity. Date and figures approximate.Lahti, Finland13 Aug 2027Silk Road Mountain RaceSavage~1,900-2,050km self-supported high-altitude bikepacking ultra through Kyrgyzstan's Tian Shan. ~28,000-35,000m climbing, passes above 3,500m, 400km+ resupply gaps. Solo/pairs. 14-day cutoff. Route (and start/finish) redrawn yearly. 2027 date approximate.Tian Shan mountains, Kyrgyzstan (start/finish change yearly)14 Aug 2027GBDUROSavage~2,000km self-supported off-road ultra the length of Great Britain, Land's End -> John o' Groats. ~30,000m climbing over singletrack, byways, moorland, bog, and hike-a-bike. Historically a checkpoint 'enduro' format. Mid-August date is approximate for the next edition.Land's End -> John o' Groats, Great Britain14 Aug 2027Surrey Gravel EpicHardOne of the punchier, more technical Glorious Gravel routes — Surrey Hills sandy greensand bridleways, wooded hill tracks and byways from Cranleigh with repeated steep climbs. 63/93km, fully signed, feed stations, no cut-offs. Date approximate (mid-August series pattern).Cranleigh, Surrey14 Aug 2027The Downs DivideSavageGlorious Gravel's big southern endurance day — a 162km chalk-and-flint line linking the North and South Downs from Cranleigh, Surrey (also a 102km route). Fully signed, feed stations, no cut-offs, e-bikes welcome. Date approximate.Cranleigh, Surrey → North & South Downs loop15 Aug 2027SBT GRVLToughWorld-class gravel racing at sustained altitude out of Steamboat Springs, Colorado (~2,000 m+). The flagship Black route is ~142 mile (229 km) with ~3,000 m+ of Rocky Mountain climbing. 2027 date is approximate (traditionally mid-August).Steamboat Springs, Colorado, USA19 Aug 2027SPAR Swiss EpicHardA 5-day fully-supported Alpine MTB stage race ridden in two-rider teams across Graubünden (Davos–Engadin), ~340km / ~11,000m total. Both riders finish each stage together. Date approximate.Davos–Engadin, Graubünden, Switzerland (multi-stage)21 Aug 2027Grand Raid BCVSTough~125km Alpine MTB marathon, Verbier → Grimentz, Valais, crossing three valleys. ~5,000m climbing — one of the biggest single-day loads in XCM, closer to an ultra. High passes, technical descents, hike-a-bike. Shorter starts + intermediate cutoffs. ~2,500 riders. Next edition ~21 Aug 2027 (approximate).Verbier → Grimentz, Valais, Switzerland21 Aug 2027Leadville Trail 100 RunToughThe 'Race Across the Sky': a comparatively runnable 100-miler whose difficulty is pure altitude, never dropping below ~9,200ft and crossing Hope Pass (~12,600ft) twice. 30h cutoff, sub-25h 'big buckle'. Date approximate (3rd Sat of August).Leadville, Colorado (out-and-back over Hope Pass)21 Aug 2027Ridgeway Gravel EpicHardGlorious Gravel sportive on the ancient Ridgeway chalk downland from Newbury, Berkshire — 110/70/50km of rolling North Wessex Downs gravel. Fully signed, feed stations, no cut-offs, e-bikes welcome. Date approximate.Newbury, Berkshire — the Ridgeway, North Wessex Downs22 Aug 2027ADAC Cyclassics HamburgToughGermany's biggest one-day race and a UCI Gran Fondo qualifier — a flat, fast, big-bunch city event finishing with a boulevard sprint in Hamburg. Routes vary yearly (historically ~155km; 2026 offered ~110km/~60km). Next date approximate — verify.Hamburg, northern Germany22 Aug 2027Granfondo San GottardoToughOne-day Alpine gran fondo from Ambrì, Ticino — long route ~110-113km / ~2,900m over three iconic Gotthard-region passes (Gotthard, Furka, Nufenen). ~53km short option. Climbing W/kg decides it. Next date approximate.Ambrì, Leventina, Ticino, Switzerland22 Aug 2027L'Étape Slovakia by Tour de FranceToughRolling ~112km / ~1,700m TdF-branded sportive from Bratislava through the Malé Karpaty forests, finishing uphill on Kamzík. Date approximate.Bratislava, Slovakia22 Aug 2027Paris-Brest-Paris RandonneurBrutal~1,218km self-paced randonnée from Rambouillet (near Paris) out to Brest on the Atlantic and back. ~11,500m of relentless rolling through Normandy and Brittany, no big mountains but never flat. Runs once every four years (next 22 Aug 2027). 15 controls with rolling cut-offs, 80/84/90hr time limits by start wave. Entry earned by completing a full Super Randonneur brevet series (200/300/400/600km) in the same year. Solo, semi-supported (help only at controls), multi-night riding.Rambouillet → Brest → Rambouillet, France22 Aug 2027Solway Coast Big Onion GravelToughGrassroots, gritty SW Scotland gravel sportive across Galloway coast and forest — exposed, wind-hit Solway shore plus forest fire roads, self-reliant. 'Big Onion' long and short routes; exact distance/climbing and the late-August 2027 date are approximate (confirm with organiser).Solway Coast, South West Scotland (Galloway)23 Aug 2027Haute Route AlpsHardPremium 7-day timed amateur road stage race across the French Alps, Nice to Thonon-les-Bains — ~808km / ~19,255m over 7 timed stages on iconic cols (Galibier, Izoard, Alpe d'Huez). The 'amateur Tour de France'.Nice → Thonon-les-Bains, French Alps25 Aug 2027TDS (Sur les Traces des Ducs de Savoie)ToughThe most technical UTMB-week race — ~145km / ~9,100m of remote, high, wild trails from Courmayeur to Chamonix. Next-date approximate (UTMB week, late August).Courmayeur, Italy → Chamonix, France26 Aug 2027OCC (Orsières-Champex-Chamonix)ToughThe shortest, fastest UTMB-week race — ~56km / ~3,500m from Orsières (Switzerland) to Chamonix, the accessible entry to the UTMB series. Next-date approximate (UTMB week, late August).Orsières, Switzerland → Chamonix, France27 Aug 2027CCC (Courmayeur-Champex-Chamonix)ToughThe ~100km / ~6,100m little sister of UTMB — Courmayeur to Chamonix over Grand Col Ferret, a huge competitive UTMB-week field, one night out. Next-date approximate (UTMB week, late August).Courmayeur, Italy → Chamonix, France27 Aug 2027FurtherSavage~400-500km self-supported off-road mountain ultra 'Race & Rally' in the Ariège Pyrenees, created by Camille McMillan. Deliberately mixes road climbing, off-road riding, and heavy bike-carrying over high cols. Fri->Mon window. Climbing (~11,000m) and late-August 2027 date are approximate — vary by edition.Ariège Pyrenees, France (loop)28 Aug 2027BadlandsSavage~800km self-supported ultra-distance gravel race from Granada through eastern Andalusia — deserts, Mediterranean coast, and the Sierra Nevada. ~16,000m climbing in extreme heat. Solo/pairs. Late-August date is approximate for 2027.Granada, Andalusia, Spain (loop)28 Aug 2027BirkebeinerrittetTough~84km point-to-point MTB marathon, Rena → Lillehammer, Norway, tracing the historic Birkebeiner route. Big early climb onto the Sjusjøen plateau, then exposed high country. Riders must carry a ~2kg pack. ~17,000 across Birken week. Next edition ~28 Aug 2027 (approximate).Rena → Lillehammer, Innlandet, Norway28 Aug 2027Kielder Triple CrownToughGlorious Gravel's remote endurance day — 186km (also 114/57km) of relentless rolling hard-packed forest-road gravel in Kielder Forest, Northumberland. Big, exposed, self-sufficient. Fully signed, feed stations, no cut-offs, e-bikes welcome. Date approximate.Kielder, Northumberland — Kielder Forest Park28 Aug 2027Log Driver's WaltzSavageRemote self-supported gravel bikepacking through Ontario/Quebec Canadian Shield wilderness, ~385/805/1,610km route options. Late-August date and distances/elevation approximate.Almonte, Ontario, Canada (loop)28 Aug 2027North Wales 400SavageRugged self-supported mountain bikepacking loop of Snowdonia and the Berwyn, ~320/410km. UK Triple Crown event. Late-August date and distances/elevation approximate.Llandegla, North Wales (loop)28 Aug 2027Torino-Nice RallySavageA ~700km / ~16,000m self-supported Alpine bikepacking rally (NOT a race) from Turin to Nice over legendary gravel and paved cols, every day over 2,000m. Date is approximate.Turin, Italy → Nice, France28 Aug 2027Tour des Stations — UltrafondoTough242km Alpine ultra-cyclosportif from Verbier, Valais — 8,848m of climbing (Everest height in a day). Billed 'the toughest one-day bike race in the world'; ~5% finish rate in bad years. Shorter Superfondo/Granfondo/Mediofondo options. Next edition ~late Aug 2027 (approximate).Verbier / Val de Bagnes, Valais, Switzerland29 Aug 2027TCS Sydney MarathonTough42.195km point-to-point road marathon through Sydney. North Sydney start over the Sydney Harbour Bridge, finish at the Opera House forecourt. Scenic but genuinely rolling (~313m gain, net -83m) — NOT pancake flat. The newest (7th) Abbott World Marathon Major.Sydney, Australia29 Aug 2027TORQ In Your SleepBrutal12-hour lapped MTB endurance race at Minley Manor, Hampshire. ~13km fast XC 'figure-of-8' lap, mainly flat with three punchy climbs. Solo/pairs/teams/singlespeed/fatbike + a 6hr race. Late-August Bank Holiday. Next edition ~29 Aug 2027 (approximate).Minley Manor, near Yateley, Hampshire29 Aug 2027Wild Wales ChallengeTough~90mi / ~9,500ft Welsh climbing challenge ride from Bala, on the edge of Snowdonia. Punishing ~105ft/mile ratio over minor, gravelly mountain roads incl. Bwlch y Groes (highest road pass in Wales). Cult 40+ year event. Next edition ~29 Aug 2027 (approximate).Bala, Gwynedd, Wales30 Aug 2027Haute Route PyreneesHardTimed amateur road stage race on steep, raw Pyrenean cols (Tourmalet, Aubisque) — a 3-day format concentrating the range's iconic climbs into three hard timed stages, cumulative GC. Date approximate.French/Spanish Pyrenees30 Aug 2027Kronplatz KingToughClimb-dominant Dolomite MTB marathon with a summit finish at the ~2,275m top of Kronplatz — the race ends UP, not down. Distance/elevation and date are approximate estimates.Plan de Corones / Kronplatz, South Tyrol, Italy4 Sept 2027Bohemian Border Bash RaceSavageLong self-supported gravel bikepacking loop around the Czech borderlands, forests and sandstone, ~1,410km. Early-September date and distances/elevation approximate.Jetřichovice, Czech Republic (loop)4 Sept 2027Rebecca's Private IdahoToughRebecca Rusch's bucket-list high Rocky Mountain gravel — the Baked Potato 100mi/~2,590m at altitude, plus a Fully Loaded 118mi and a multi-day Queen's Stage Race option. Date approximate (Labor Day weekend).Ketchum / Sun Valley, Idaho4 Sept 2027Ride Across Britain (RAB)ToughThe UK's premier Land's End to John o' Groats mass event: a 9-day, fully-supported staged charity ride of ~1,560km and ~15,000m climbing over ~9 daily ~108mi stages, with catered basecamps, medics and baggage transfer. A durability-and-recovery life goal, not a race or self-supported bikepacking. Dates approximate (est 4-12 Sep 2027).Land's End → John o' Groats (LEJOG)4 Sept 2027Swiss Cycling AlpenbrevetToughAndermatt-based Alpine cyclosportif over up to five classic Swiss passes (Susten, Furka, Grimsel, Nufenen, Gotthard). Flagship Gold tour ~212km / ~5,000m; Platin ~267km / ~6,800m. Next date approximate — verify.Andermatt, Uri, central Swiss Alps4 Sept 2027The Bà Sportive (Bealach na Bà)Tough~90mi / ~3,000m Highland climbing sportive from Kinlochewe, Wester Ross, centred on Bealach na Bà — Britain's hardest tarmac climb (626m, alpine hairpins, 20% ramps). Remote, exposed, wild. Ex-Bealach Mor. Next edition ~4 Sep 2027 (approximate).Kinlochewe, Wester Ross, Scottish Highlands4 Sept 2027The Naughty NorthumbrianHardTimed-stage MTB enduro at Kielder — result is combined timed descent-stage times, liaison climbs untimed; decided by descent skill and repeatability, not FTP. Distance/elevation/stages and date are approximate estimates.Kielder, Northumberland, England5 Sept 2027HONC — Hell of the North CotswoldsToughMixed-surface off-road endurance ride from Sudeley Castle, Winchcombe (North Cotswolds). 50/75/100/140km on tarmac, farm tracks, byways and bridleways — significant off-road. ~1,250+ riders, 40+ year original. Next edition ~5 Sep 2027 (approximate).Winchcombe, Gloucestershire (North Cotswolds)5 Sept 2027Manchester 100 Bike RideToughA flat, friendly charity century from Wythenshawe Park through the Cheshire countryside — 100 miles (~970m) or 100km (~535m). A classic first-100-miles endurance goal, not a climbing test. Next date approximate — verify.Wythenshawe Park, Manchester6 Sept 2027Dragon's Back RaceHard~380km / ~17,400m over 6 days down the mountainous spine of Wales, largely unmarked and self-navigated. One of the world's toughest mountain stage races. Next-date approximate (early September).Conwy Castle → Cardiff Castle, Wales10 Sept 2027Tor des Glaciers (TOR450)ToughThe extreme TORX sister to Tor des Géants: ~450km / 32,000m D+ single-stage, semi-self-sufficient on the highest glacial routes of the Aosta Valley, 6-8 days, ~190h limit — reserved for prior TOR330 finishers. Date approximate (mid-September).Courmayeur, Aosta Valley, Italy (high glacial routes)11 Sept 2027Chasing Cancellara Bern–ZermattTough'Switzerland's toughest one-day race' — a ~275km / ~5,500m point-to-point Alpine gran fondo from Bern to the foot of the Matterhorn at Zermatt. Deliberately small (~400 riders), premium, Cancellara-branded. Solo/relay/couples. Next date ~2027-09-11 approximate.Bern → Zermatt, Switzerland11 Sept 2027Further UncededSavageSelf-supported off-road mountain bikepacking Race & Rally in the remote BC Coast Mountains near Pemberton — Camille McMillan's Further, Canadian edition. Defined by huge vertical and deliberate hike-a-bike in true wilderness. Distance (~560km), climbing, and September date are approximate.Pemberton, BC, Canada (Coast Mountains)11 Sept 2027Lake District Gravel EpicHardThe hilliest Glorious Gravel 'Epic' for its distance — 90km (also 66/50km) of steep, rough Lakeland fell gravel and bridleway from Coniston, Cumbria. A high climb-per-km day. Fully signed, feed stations, no cut-offs, e-bikes welcome. Date approximate.Coniston, Lake District, Cumbria12 Sept 2027Brecon BeastTough109km (and 71km) Welsh mountain MTB marathon over Brecon Beacons moorland and rocky byways, with big climbing — a cult charity event. Next date ~2027-09-12 is approximate; confirm the event is running.Brecon Beacons (Bannau Brycheiniog), Wales12 Sept 2027The Elan Valley GravelToughRemote mid-Wales gravel sportive around the Elan Valley reservoirs and moorland, with climbs linking the dams — self-reliant, weather-exposed, grassroots. Long and short routes; exact distance/climbing and the mid-September 2027 date are approximate (confirm with organiser).Elan Valley, Mid Wales12 Sept 2027Tor des Géants (TOR330)ToughOne of the toughest ultras on earth: ~330km / 24,000m D+ single-stage, semi-self-sufficient (no pacers) around the Aosta Valley's Alte Vie, 25+ passes over 2,000m, 4-6 days on the move, 150h limit. Date approximate (mid-September).Courmayeur, Aosta Valley, Italy (Alte Vie loop)18 Sept 2027Calder Divide TrailSavageShort but ferociously steep self-supported bikepacking loop around the Calder Valley gritstone, ~151/235km with extreme climbing-per-km. Mid-September date and distances/elevation approximate.Hebden Bridge, West Yorkshire (loop)18 Sept 2027Cotswolds 100/200/300SavageAccessible rolling self-supported gravel bikepacking through the Cotswolds limestone country, ~100/200/300km. Ideal first ultra. Mid-September date and distances/elevation approximate.Cotswolds, England (loop)22 Sept 2027Momentum Cape Pioneer TrekTough5-day MTB stage race across South Africa's Klein Karoo semi-desert and Outeniqua mountains (~500km, approximate). Heat, sand and remote exposure; ridden solo or in pairs. Date and figures approximate until the organiser confirms.Oudtshoorn, Klein Karoo, Western Cape, South Africa24 Sept 2027The Bear 100ToughA classic Rocky Mountain Slam 100-miler: point-to-point across the Bear River Range from Utah into Idaho, ~22,000ft of climbing at peak autumn colour, cold high nights, 36h cutoff. Date approximate (last weekend of September).Logan, Utah → Fish Haven, Idaho (Bear River Range)24 Sept 2027Trans Pyrenees RaceSavage~1,500-1,800km self-supported ultra-distance ROAD race — a double coast-to-coast traverse of the Pyrenees, run by Lost Dot. ~30,000m+ climbing over iconic cols; autumn weather with snow risk. Solo/pairs, ~8-day limit. Start/finish/turnaround change by edition; 2027 date approximate.Double traverse of the Pyrenees (coast-to-coast-to-coast; endpoints change by edition)25 Sept 2027Dorset Gravel EpicHardGlorious Gravel sportive on varied Purbeck ridge and Dorset heath gravel from Wareham — 95/65km of rolling, coastal-fringe, mixed-surface riding. Fully signed, feed stations, no cut-offs, e-bikes welcome. Date approximate.Wareham, Dorset — Isle of Purbeck & Dorset heaths26 Sept 20273 Peaks Cyclo-CrossToughThe legendary hardest cyclocross race in the world: ~61km over the three Yorkshire peaks (Ingleborough, Whernside, Pen-y-ghent) on CX bikes, with brutal hike-a-bike carries up rocky fells. Ballot entry, capped at ~400. Date approximate (est. 26 Sep 2027).Helwith Bridge / Horton-in-Ribblesdale, Yorkshire Dales26 Sept 2027Berlin MarathonToughThe flattest Abbott Major and the world-record course, starting and finishing at the Brandenburg Gate. The largest marathon in the world (54,280 finishers in 2024) and the best PB opportunity in marathoning. Next date ~26 Sep 2027 (approximate, last Sunday of September — confirm against the official site).Straße des 17. Juni → Brandenburg Gate, Berlin, Germany2 Oct 2027L'EroicaToughVintage 'ciclostorica' heritage ride from Gaiole in Chianti, Tuscany — the origin of the whole eroica gravel movement. 46-209km with ~112km of white gravel on the long route (~3,768m). Non-competitive, ridden on pre-1987 steel bikes. ~8,000 riders. Next edition ~2 Oct 2027 (approximate).Gaiole in Chianti, Tuscany, Italy2 Oct 2027The Affric Gravel SportiveToughRemote Highland gravel sportive through Glen Affric on rugged estate and forest tracks — self-reliant, weather-exposed, grassroots. Long and short routes; exact distance/climbing and the early-October 2027 date are approximate (confirm with organiser).Cannich / Glen Affric, Scottish Highlands3 Oct 2027L'Étape Czech Republic by Tour de France (Flat)ToughFast, flat ~111km / ~250m TdF-branded sportive from Pardubice across East-Bohemian farmland — a power, aero and echelon-tactics ride where wind decides the day. Date approximate.Pardubice, Czech Republic3 Oct 2027Tre Valli Varesine Gran FondoToughClosed-road gran fondo on the historic Tre Valli Varesine pro roads (UCI GF World Series; UEC European Champs host). ~126km / ~2,500m of continuous pre-Alpine climbing between Lakes Lugano, Maggiore and Varese. ~99km medio option. Next date ~2027-10-03 approximate.Varese, Lombardy, Italy10 Oct 2027Chicago MarathonToughFlat, fast, minimal-turn Abbott Major starting and finishing in Grant Park, through 29 neighbourhoods including the Magnificent Mile and Chinatown. Alongside Berlin, one of the two great PB courses. Always the second Sunday of October; next 10 Oct 2027. 6:30 course cutoff.Grant Park → Columbus Drive, Chicago, Illinois, USA10 Oct 2027Gran Fondo Il LombardiaToughThe 'Falling Leaves' monument as a gran fondo: a ~110km climbing-dense autumn day from Bergamo, built around the Valico di Valcava (~11.6km @ ~8%). Date approximate. Current Bergamo route replaces the historic Como/Ghisallo course.Bergamo, Lombardy, Italy (loop start/finish)10 Oct 2027Kielder 101Tough101km off-road MTB marathon through Kielder and Newcastleton forests (England into Scotland and back), plus a 60km Border Challenge — a remote, fire-road-heavy endurance day. Next date ~2027-10-10 is approximate; confirm on the official site.Kielder Castle, Kielder Forest, Northumberland10 Oct 2027Nike Melbourne MarathonToughAustralia's premier marathon — around Albert Park Lake and the St Kilda foreshore, finishing inside the MCG. Recently reimagined into a faster, flatter, PB-friendly course. Next date ~10 Oct 2027 (approximate — confirm on the official site).Melbourne, Australia10 Oct 2027Sherwood Pines Autumn TrophyToughAn accessible Glorious Gravel 'Trophy' — a fast, welcoming 60km loop of firm forest gravel around Sherwood Pines, Clipstone, Nottinghamshire. A great first gravel event. Fully signed, feed stations, no cut-offs, e-bikes welcome. Date approximate.Clipstone, Nottinghamshire — Sherwood Pines / Sherwood Forest10 Oct 2027The Roman's RevengeToughGrassroots Welsh gravel sportive over old Roman roads and forest tracks — punchy, repeated loose-surface climbing, self-reliant and weather-exposed. Long and short routes; ALL distance/climbing figures and the early-to-mid-October 2027 date are approximate (confirm with organiser).Wales (mid/upland)16 Oct 2027Big Sugar GravelToughThe final race of the Life Time Grand Prix — ~100mi/~2,900m of fast, chunky Ozark gravel with sharp tyre-shredding flint. Date approximate.Bentonville, Arkansas17 Oct 2027TCS Toronto Waterfront MarathonToughCanada's championship marathon — a mostly flat, fast course through the downtown core and along the waterfront, finishing near Nathan Phillips Square. A strong PB course with a few short inclines. Next date ~17 Oct 2027 (approximate — confirm on the official site).Toronto, Canada17 Oct 2027Thetford Forest Autumn TrophyToughAn accessible Glorious Gravel 'Trophy' — a flat, fast-but-sandy 56km loop through Thetford Forest and the Breckland, Norfolk. Great first gravel event; the soft sand, not hills, is the challenge. Fully signed, feed stations, no cut-offs, e-bikes welcome. Date approximate.Thetford, Norfolk — Thetford Forest & Breckland21 Oct 2027Grand Raid Réunion (Diagonale des Fous)ToughThe Madmen's Diagonal — a ~165km / ~10,000m D+ crossing of Réunion Island's volcanic mountains through tropical heat, humidity, and the cirques. Next-date approximate (late October).Saint-Pierre → Saint-Denis, Réunion Island24 Oct 2027Irish Life Dublin MarathonTough42.195km road marathon through the Irish capital, Leeson Street start to Mount Street Upper finish, past Trinity College, Dublin Castle and Phoenix Park. ~160m, relatively flat with real second-half inclines. Cool, often wet-and-windy late-October weather. 7hr cutoff. Date approximate (October bank-holiday weekend).Dublin, Ireland24 Oct 2027Mainova Frankfurt MarathonToughFlat, fast German city marathon (only ~28m height difference) with an iconic finish inside the Festhalle on a red carpet. The 3rd-fastest city race worldwide and the fastest of the big German marathons. Next date ~24 Oct 2027 (approximate, last Sunday of October — confirm on the official site).Frankfurt am Main, Germany29 Oct 2027FNB Wines2WhalesToughHugely popular 3-day MTB stage race through the Cape winelands and fynbos to the whale coast (~200-230km, approximate). Flowy singletrack and punchy climbs; ridden in pairs; an Epic Series qualifier. Date and figures approximate.Elgin → Onrus, Western Cape, South Africa31 Oct 2027Marine Corps MarathonTough'The People's Marathon' — organised by the US Marine Corps around Washington DC's monuments (Pentagon, Lincoln Memorial, Capitol), with no prize money. A rolling course with early Georgetown hills and an uphill finish to the Iwo Jima Memorial. Next date ~31 Oct 2027 (approximate).Arlington / Washington DC, USA31 Oct 2027Peak District Gravel XToughHARDER (grade D), autumn gravel sportive on steep, rough Peak terrain from Hope — 69/52km in cold, wet, short-daylight late-October conditions, feed stations, no cut-offs. Climbing estimated. Date approximate.Hope, Peak District, England31 Oct 2027TCS Amsterdam MarathonToughA near-pancake-flat WA Platinum Label marathon starting and finishing in the Olympic Stadium, past the Rijksmuseum and along the exposed Amstel River — one of the world's fastest, where wind is the key variable.Olympic Stadium, Amsterdam7 Nov 2027Athens Marathon "The Authentic"Tough42.195km road marathon on the original route from Marathon town to Athens, finishing in the marble Panathenaic Stadium. ~300m elevation dominated by a long sustained climb from ~10km to ~31km, then a descent into Athens. One of the tougher big-city marathons, not a PB course. 08:30 start. Date approximate (early November).Athens, Greece7 Nov 2027TCS New York City MarathonTough42.195km point-to-point road marathon across all five boroughs of New York. Staten Island start at the foot of the Verrazzano-Narrows Bridge, finish in Central Park. Rolling and bridge-heavy (~340m climb, five bridges) — NOT a PB course. Abbott World Marathon Major, largest marathon in the world by finishers.New York City, USA5 Dec 2027Valencia Marathon (Trinidad Alfonso)ToughOne of the flattest, fastest marathons on earth and a world-record-calibre PB destination, run on wide city boulevards in cool early-December weather. Next-date approximate (first Sunday of December pattern).City centre, Valencia12 Dec 2027JAL Honolulu MarathonToughA huge, no-cutoff, no-qualification marathon in paradise — downtown Honolulu, Waikiki, around Diamond Head and out to Hawaii Kai. Mostly flat, but the 5am start and hot, humid tropical conditions (climbing past 28°C) make heat the whole story, not a PB. Next date ~12 Dec 2027 (approximate).Honolulu, Hawaii, USA
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