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Races

UTMB Mont-Blanc

A 100-mile mountain race in Chamonix, France. The main race loops around Mont Blanc through France, Italy and Switzerland in late August.

For The Reps · Updated

Woman descending a scree slope in an alpine trail race
Woman descending a scree slope in an alpine trail race. AI-generated image.
Type
Trail race
Where
Chamonix, France
Level
Experienced trail runners

Race dates

The date for the next edition is not published yet.

The 2026 race was on Week of August 24, 2026.

Dates change, so check the official site before you enter or book travel. Last checked June 3, 2026.

About the race

You need running stones from UTMB World Series events to get into the lottery.

Best for experienced trail runners.

Training for it

Trail races reward time on your feet and climbing more than road speed. Train on terrain like the course.

  • Build your long runs by time rather than distance.
  • Practise hiking the steep climbs and running the descents.
  • Check the mandatory kit list early and train with that kit on.