Marathon du Mont-Blanc is a prestigious sporting event organized by the Club des Sports de Chamonix, a non-profit association dedicated to promoting outdoor sports. Set against the stunning backdrop of the Mont Blanc massif, this event showcases a variety of running competitions, attracting thousands of participants and spectators each year.

Notable races include the iconic 42km du Mont-Blanc, which is a highlight of the Golden Trail World Series, and other challenging distances such as the 90km, 23km, 10km, as well as junior and mini races.

Scheduled for June 26-29, 2025, the Marathon du Mont-Blanc not only celebrates athletic excellence but also fosters community spirit, with a team of over 750 dedicated volunteers. Participants and their supporters can enjoy a vibrant atmosphere featuring the Trail Camp, award ceremonies, and opportunities to meet elite runners. Emphasizing values of environmental stewardship and solidarity, this event is a true celebration of nature and human endurance.