Course map, elevation profile & surface
Fly the course
Follow the route over 3D terrain, kilometre by kilometre.
Race-day light
For a 26:25 finish (an estimate) · starting 07:00 26 Aug · headlamp km 90–152. Dark means the sun below civil twilight.
Climbs
21 climbs · 9,222 m totalbiggest firstConditions typical race-day weather for 26 Aug at the start
Typical = the median of 2016–2025 for 26 Aug ±3 days at the start line; a wet day has 1 mm of rain or more. Historical weather from Open-Meteo.
Race almanac 3 years of this race
Past editions
Race-day highs at the start ran from 19° to 27°C, and 1 of 3 race days were wet.
| Year | Start °C | Rain | Wind | Heat index |
|---|---|---|---|---|
| 2026 Aug 26 | 26°/13° | dry | 7km/h | — |
| 2025 Aug 29 | 19°/9° | 11mm | 11km/h | — |
| 2024 Aug 30 | 27°/14° | dry | 8km/h | 27° |
race-day weather from the Open-Meteo historical archive (ERA5) at the start line.
Reviews what runners who have been there say
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About this course
Ultra Trail Du Mont Blanc by UTMB — 2026 covers 173.8 km (108.0 mi) with 9,994 m (32,790 ft) of elevation gain. That is about 57 m per km of climbing, and 9,993 m of descent. The course tops out at 2,571 m and bottoms out at 805 m. The profile has 21 sustained climbs; the biggest is the climb from km 34.0, +1,322 m over 12.2 km at 10.9% on average (steepest stretch 29%). Race day is 26 August 2026, starting at 07:00; the sun rises at 06:46 and sets at 20:24. Typical race-day weather at the start: a high of 24°C and a low of 12°C, with a 33% chance of a wet day. The interactive map above shows the full route with its elevation profile and aid stations, built from the course's GPS file.
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Course history
- Oct 27, 2026Added to the catalog
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