France trail race

UTMB - Ultra-Trail du Mont-Blanc

Fri, August 28, 2026 · Chamonix, Haute-Savoie

The world's most iconic ultra trail: a full loop around Mont Blanc through France, Italy, and Switzerland. 171 km with 10,000 m of elevation gain.

5 weeks to go Good timing for course research, travel planning, terrain-matched long runs, and a structured build.

Race Overview

UTMB - Ultra-Trail du Mont-Blanc is a trail race held on Fri, August 28, 2026 in Chamonix, Haute-Savoie, France. TrailSplits currently includes 3 mapped courses for this event, with course maps, elevation profiles, weather context, and pacing tools for the uploaded GPX data.

5 weeks to go

Race route lab

Turn OCC 55K 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 63 m climb per km.

Race tools — OCC 55K

Fri, August 28, 2026

5 weeks to go

Selected distance

Free training plan — OCC 55K

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

OCC 55K plan 55.5 km · 3499 m D+

3D Trail Preview

Course map — OCC 55K

Interactive MapLibre preview with the official GPX track.

Min Max

Elevation profile — OCC 55K

Based on the official GPX track.

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Historical Results (2025)

UTMB - Ultra-Trail du Mont-Blanc OCC 55K — 2025 edition. 2000 finishers.

🏆 Winner
4h 38m
📊 Median
9h 15m
50th percentile
👥 Finishers
2000
⚡ DNF Rate
12%
Low DNF rate
A target between 4h 38m and 9h 15m 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.

Official website: https://utmbmontblanc.com