France trail race
Fri, June 26, 2026 · Chamonix, Haute-Savoie
One of the most beautiful trail running festivals in the world, with 10,000 runners across 8 races over 4 days beneath Mont Blanc. The flagship 42 km with 2,540 m of climbing is joined by the epic 90 km ultra, the historic 23 km Cross, and a festive 10 km.
Marathon du Mont-Blanc is a trail race held on Fri, June 26, 2026 in Chamonix, Haute-Savoie, France. TrailSplits currently includes 4 mapped courses for this event, with course maps, elevation profiles, weather context, and pacing tools for the uploaded GPX data.
Race route lab
Open the official GPX in Planner, then choose a nearby start point to build a shorter loop that matches the course demand. This course averages about 75 m climb per km.
Fri, June 26, 2026
Selected distance
Vert-focused blueprint with route-finder links into the Planner.
Interactive MapLibre preview with the official GPX track.
Based on the official GPX track.
Load the GPX directly into TrailSplits for surface analysis and terrain intel.