90
Marathon du Mont-Blanc
trailmarathoniconicmont blancmountainscenicsummer
Distances
90K · 42K · 23K · 10K
Profile
Mountainous
Surface
Trail
Slots
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Visa
Schengen
Time limit
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Marathon du Mont-Blanc takes place in late June in Chamonix, organised by the Club des Sports de Chamonix, founded back in 1905, and around 10,000 runners line up each year. There are eight races: 90, 42, 23 and 10 km, a vertical kilometre, the night-time Duo Étoilé for pairs and kids' races. The courses follow mountain trails around the Chamonix valley, with balcony paths facing the Mont Blanc glaciers, steep climbs and technical descents. Solidarity bibs support research into rare diseases, and after the finish Chamonix offers the Aiguille du Midi cable car, the Mer de Glace glacier and alpine terraces serving tartiflette.
Course records
No course record data yet.
Weather in June
6–22°C
variable
Late June: warm in the valley, cool at altitude near the Flégère glacier balconies.
Starter pack 2025
- bib with timing chip
- finisher medal
- technical t-shirt
- goody bag
Standard starter pack.
Pacers & bib pickup
No pacers announced for this race.
Bib pickup
Chamonix race expo
day before the race only
Bib pickup the day before.
Registration opens
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Registration closes
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Current price
~€78
Status checked
12 October 2026
Course map
Route not added yet
What’s nearby
Dinner before the race
Carb-loading recommendation coming later.
After the finish
Airports
GVA · 75 min
Reviews
No reviews yet.
Registration not open yet · Checked 12 Oct 2026