A 40 km Switzerland-to-Chamonix race for UTMB volunteers, partners and locals
Other trail races within 69 miles
A 40 km point-to-point from Martigny-Combe in Switzerland to Chamonix, over the Col de la Forclaz and the Col de Balme and down through Argentière. It is not open to the general public: bibs go to local residents of the Mont-Blanc valleys (58%), UTMB volunteers (30%), partners (10%) and journalists (2%). No Running Stones or UTMB Index are needed. It runs entirely in daylight so volunteers can still work their shifts the rest of the week. The time limit is 10 hours, and no crew help is allowed on course.
Some ultra experience recommended
Chamonix, Haute-Savoie, FranceAugust 24, 2026
MCC – Martigny-Combe-Chamonix is a point-to-point trail race in Chamonix, Haute-Savoie, France, held on August 24, 2026. The course covers 40 km, climbs 2,305 m, and has a 10h cutoff.
| Location | km | Elevation | Cutoff |
|---|---|---|---|
Start Start | 0.0 | 507 m | — |
Finish Finish | 40.0 | 1,035 m | 10h8:00 PM |
Aid station details for this race are still being filled in. Cutoffs and access rules come from the race’s own published information and can change — check the official race details before planning around them.
Sign in for race-day weather at every station, points of interest, segment-by-segment analysis, pacing, and to save this race to your calendar.
Runners may not take part with a dog or any other animal, including service animals.
Late August around Mont-Blanc can bring anything. The valleys (Chamonix about 1,035 m, Courmayeur about 1,220 m) often see 20–30 °C days, while the passes above 2,000 m can drop below freezing at night, and the organizers warn of temperatures down to −10 °C, with rain, hail or snow possible. Afternoon thunderstorms are common, and weather can force course changes or delays.
Afternoon storms on the exposed Col de Balme
![Video thumbnail: [UTMB 2025] Marine Quintard et Mathis Dumas : retour sur la MCC](https://img.youtube.com/vi/k1jWtpkQ6aA/hqdefault.jpg)
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