DateExpected
Late September 2027
Based on past editions. We'll confirm when the organiser announces.
Venue
Champ du Savoy, Chamonix-Mont-Blanc, France
Chamonix-Mont-Blanc, Haute-Savoie
Countdown
September
The big one at Chamonix: 50 km round a single loop with 3,700 m of climbing, starting in the dark at 5am. A proper day in the mountains, not a quick spin.
Key facts
01Semi-autonomous: you carry what you need between support points
02Open to runners born in 2007 or earlier, licensed or not
Create a free training plan for the Trail des Aiguilles Rouges 50 km
7-day free trial, no card required
The course
The route
Chamonix-Mont-Blanc
Distance50km
Total climb3,700m
StartElevation
0 kmDrag map to rotate45.4 km
Weather
Late-September, Chamonix-Mont-Blanc
14°CTypical high
4°CTypical low
-5°CColdest in 20 years
42%Days with rain
Highs around 14°C and lows around 4°C, but it has dropped to -5°C. Rain on 42% of days. Pack for the cold end, not the average.
NASA POWER data, 2006-2025, the week either side of race day
2026 results
Who finishes, and how
#RiderTimeAvg speed
01Candice FERTIN-BACCON07:06:057.0 km/h
02Hortense MERMILLON08:04:476.2 km/h
03Mathilde BERLAND08:29:545.9 km/h
79
Women finishers
11:26:16
Median time
4.4 km/h
Median speed
Women · 2026 results, as published by the organiser.
How fast could you finish?
Get a prediction based on your recent training
Organiser
OrganiserChamonix Mont-Blanc Marathon (CMBM)
Websiteaiguillesrouges.fr
Instagram@traildesaiguillesrouges
Running since2007
Training
Training for the Trail des Aiguilles Rouges 50 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 Trail des Aiguilles Rouges 50 km plan targets
Typical sessions
50 km with 3,700 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 Trail des Aiguilles Rouges 50 km plan.
7-day free trial, no card required.
Other races at Trail des Aiguilles Rouges
More events in September in France
Alps DivideExpected Early September 2027 · Alpine traverse → Menton→L'Échappée MICHELIN Paris-ClermontExpected Early September 2027 · Clermont-Ferrand→Le Trail du GraalExpected Early September 2027 · Néant-sur-Yvel→Saint-Jeoire Trail FestivalExpected Early September 2027 · Saint-Jeoire→Trail de la MeijeExpected Early September 2027 · Commensacq→Ultra Trail Haut-Koenigsbourg®Expected Early September 2027 · Kintzheim→
