France trail race

Marathon du Mont-Blanc

Sat, June 27, 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.

Race complete Results, recovery, and next-year planning are the useful jobs now.

Race Overview

Marathon du Mont-Blanc is a trail race held on Sat, June 27, 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 complete

Race route lab

Turn 23K into a local rehearsal route

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 66.7 m climb per km.

Race tools — 23K

Sat, June 27, 2026

Race complete

Selected distance

Free training plan — 23K

Vert-focused blueprint with route-finder links into the Planner.

23K plan 24.2 km · 1613 m D+

Other distances

3D Trail Preview

Course map — 23K

Interactive MapLibre preview with the official GPX track.

Min Max

Elevation profile — 23K

Based on the official GPX track.

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Historical Results (2025)

Marathon du Mont-Blanc 23K — 2025 edition. 1800 finishers.

🏆 Winner
1h 32m
📊 Median
2h 45m
50th percentile
👥 Finishers
1800
⚡ DNF Rate
5%
Low DNF rate
A target between 1h 32m and 2h 45m covers the full competitive range. Use the pacing calculator above to check your plan against the cutoffs.

Analyze this route in the Planner

Load the GPX directly into TrailSplits for surface analysis and terrain intel.