

About the event
On June 27, 2025, the Mont-Blanc Ultra 90km will push ultrarunners to their limits with 6330 meters of elevation gain over rugged trails in the heart of the Chamonix Valley. Organized by the Club des Sports de Chamonix, the race covers steep ascents and technical descents, testing both endurance and skill. Starting in Chamonix, participants will face some of the most breathtaking and demanding trails in the French Alps, all while navigating the stunning landscapes surrounding Mont Blanc. It’s a must-do race for elite ultrarunners seeking a true alpine challenge.
Date:
Fri
Jun 27
2025
Location:
Distance:
Elevation profile:
Hilly
Website:
LinkElevation gain:
Number of participants:
1000
Find the best training plan for your goals and the distance you’re planning to run:
Stories from Runnas
Take your running to the next level
The Mont-Blanc Ultra 90km, taking place on June 27, 2025, is a grueling ultra race with 6330 meters of elevation gain, making it one of the toughest trail races in Europe. Organized by the Club des Sports de Chamonix, this ultra marathon leads runners through challenging and technical terrain, with breathtaking views of the Mont-Blanc Massif.
If you are an official race organiser with any questions about this page, please get in touch: races@runna.com
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