Marathon du Mont-Blanc

The Marathon du Mont-Blanc is an international sports event organized by the Club des Sports de Chamonix, taking place over three days in late June 2025. It features eight running competitions around the Mont Blanc massif, including distances of 90 km, 42 km, 23 km, and 10 km, as well as a vertical kilometer and youth races. In an effort to reduce its environmental impact, the event will reserve 40% of race entries for participants who commit to using public transport to reach Chamonix.

The marathon emphasizes sustainability while celebrating the spirit of trail running in a stunning natural setting. Visit the organization's website for the most recent information.