description Chamonix Marathon Overview
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Chamonix Marathon ranks #26 of 309 in the Marathon ranking, behind Amsterdam Marathon, ahead of Dublin Marathon.
Mont Blanc setting and mountain-running prestige create strong reputation, but trail format is niche.
help Chamonix Marathon FAQ
How much climbing is in the 42 km Mont-Blanc race?
The 42 km event has about 2,540 meters of ascent and an equivalent amount of descent. Its organizers describe the course as mountain trail running between roughly 1,000 and 2,200 meters of altitude.
What is the hardest section of the Chamonix Marathon?
The steep and technical climb around Aiguillette des Posettes is identified by the organizers as the course's principal difficulty. Runners encounter it after faster, more runnable trails in the earlier part of the race.
Is the Marathon du Mont-Blanc the same event as UTMB?
No, the Marathon du Mont-Blanc is organized by the Club des Sports de Chamonix and centers on races such as its 42 km and 90 km courses. UTMB is a separate event held later in the summer, although both use trails around the Chamonix and Mont Blanc region.
What other distances are held during the Marathon du Mont-Blanc weekend?
The program includes 10 km, 23 km, 42 km, and approximately 90 km trail races, plus a Vertical Kilometer and youth events. The 42 km race is the namesake marathon, but the weekend serves several levels of mountain runner.
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