Ultra-Trail du Mont-Blanc (UTMB)

An internationally renowned series of trail running races held annually in late August/early September, starting and finishing in Chamonix. The flagship race, UTMB, covers approximately 170km with 10,000m of elevation gain, circumnavigating the Mont Blanc massif through France, Italy, and Switzerland. Attracts elite athletes and thousands of participants, creating an electrifying atmosphere in the valley. Spectator-friendly with numerous viewing points.