DateExpected
Late April 2027
Based on past editions. We'll confirm when the organiser announces.
Venue
Beyond the Trees, Avondale Forest Park, Avondale, County Wicklow
The Municipal District of Arklow, County Wicklow
Countdown
April
A 100 km run done as 31 loops of 3.2 km, solo or shared out among a relay team of up to five. Long day, steady hills, and you're never far from base.
Key facts
01Reach 16 loops within 7 hours, with a 15-hour total cut-off
02Head torch with spare batteries required for solo and relay runners
03Relay teams of up to 5 can split the loops however they like
Create a free training plan for the ALTAR 50K & 100K 100 km
7-day free trial, no card required
The course
One lap, on repeat
The Municipal District of Arklow · one lap
Distance100km
Total climb1,540m
Start · finishOne lap · elevation
0 kmDrag map to rotate3.3 km
Weather
Late-April, The Municipal District of Arklow
11°CTypical high
6°CTypical low
2°CColdest in 20 years
42%Days with rain
Highs around 11°C and lows around 6°C, but it has dropped to 2°C. Rain on 42% of days.
NASA POWER data, 2006-2025, the week either side of race day
2026 results
Who finishes, and how
#RiderTimeAvg speed
01Julianna/Kevin/Daniel/Annelie/Alice #100614:47405.9 km/h
02Alan/John/James/Claire/Geoffrey #100443:21138.4 km/h
03Adam/ Eoin/Fionnan/Ciaran/ Shane #100143:53136.7 km/h
9
Finishers
0:52:54
Median time
113.4 km/h
Median speed
Overall · 2026 results, as published by the organiser.
How fast could you finish?
Get a prediction based on your recent training
Organiser
Training
Training for the ALTAR 50K & 100K 100 km
We don't do generic plans. We combine deep knowledge of this race's demands with your recent training, then build a plan with you that progresses as you do.
Beina integrates directly with your existing tools to understand your current fitness, and synchronise your planned sessions.
Intervals.icuWhat a ALTAR 50K & 100K 100 km plan targets
Typical sessions
100 km with 1,540 m of climbing
Time on feet and fatigue resistance
Fuelling and pacing for the whole event
What your weeks look like
Typical sessions
Long runs that build time on your feet
Tempo and threshold sessions to hold race pace
Hill reps and vert to prepare the climbs and descents
Back-to-back weekend runs for fatigue resistance
Not a generic schedule
Typical sessions
Built from your current fitness and the time you actually have
Adapts every week as Beina learns how you respond
Syncs your sessions straight to Garmin and Wahoo
One clear next session, never a wall of spreadsheet
Entries open now
Get your ALTAR 50K & 100K 100 km plan.
7-day free trial, no card required.
Other races at ALTAR 50K & 100K
More events in April in Ireland
Knockmealdown HalfExpected Early April 2027 · County Waterford→Knockmealdown Mountain UltraExpected Early April 2027 · Feddaun→ALTAR NUTRITION 50KM / 100KM / 100KM RELAYExpected Late April 2027 · Rathdrum→Dysart WoodsExpected Late April 2027 · County Laois→Gougane BarraExpected Late April 2027 · Béal Átha an Ghaorthaidh→SliabhriadhExpected Late April 2027 · County Limerick→
