The courses of each race are spread throughout the Chamonix Mont-Blanc Valley and offer a breathtaking view of the mythical peaks of the Mont-Blanc massif.
The Mont Blanc Marathon is a trail event with 8 race formats from 10km to 90km including the Kilomètre Vertical and the Duo Etoilé (duo race at nightfall).
The courses of each race are spread throughout the Chamonix Mont-Blanc Valley and offer a breathtaking view of the mythical peaks of the Mont-Blanc massif.
Free of charge.
From Thursday 22 to Sunday 25 June 2023.