Course & Elevation
An iconic alpine marathon starting in Chamonix and finishing at the foot of Mont-Blanc, traversing the Chamonix Valley with relentless elevation changes through stunning mountain scenery. The course passes through classic alpine villages including Les Praz, Argentière, and Vallorcine before descending back toward Chamonix. This is one of the most challenging marathon courses in Europe, demanding significant climbing and technical trail management.
Course Facts
Weather on Race Day
16°C
Temperature
65%
Humidity
35%
Rain Chance
Early summer alpine conditions with cool mornings and mild afternoons. Occasional mountain showers possible, with significant temperature variation between valley floor and higher elevations.
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