Course map, elevation profile & surface
Fly the course
Follow the route over 3D terrain, kilometre by kilometre.
Race-day light
For a 7:15 finish (an estimate) · starting 07:00 27 Jun. Dark means the sun below civil twilight.
Climbs
8 climbs · 2,251 m totalbiggest firstConditions typical race-day weather for 27 Jun at the start
Typical = the median of 2016–2025 for 27 Jun ±3 days at the start line; a wet day has 1 mm of rain or more. Historical weather from Open-Meteo.
Race almanac the sky on race day
Next race day Sun, Jun 27, 2027 · 7:00 AM start
First and last light are civil twilight, the sun 6° below the horizon. The moon is lit as at midnight after the start; headlamp hours count a typical finish from the start while the sun is below civil twilight. Worked out for the start line.
Reviews what runners who have been there say
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About this course
Marathon du Mont-Blanc 42K — 2027 covers 43.8 km (27.2 mi) with 3,236 m (10,617 ft) of elevation gain. That is about 74 m per km of climbing, and 3,236 m of descent. The course tops out at 2,201 m and bottoms out at 1,031 m. The profile has 8 sustained climbs; the biggest is the climb from km 13.3, +723 m over 4.0 km at 18.1% on average (steepest stretch 35%). Race day is 27 June 2027, starting at 07:00; the sun rises at 05:44 and sets at 21:28. Typical race-day weather at the start: a high of 22°C and a low of 12°C, with a 53% 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 31, 2026Added to the catalog
Races like this one close in distance, climbing, terrain, altitude, weather and season
- Ultra Trail Whistler by UTMB 50K — 2026Aug · 50 km · 73 m/kmSimilar climbing · Similar weather · Same distance
- Serre Che Trail - Marathon des Cerces 45K — 2025Jul · 45 km · 71 m/kmSame distance · Similar weather · Similar climbing
- White Pine Solstice Runs — 2026Jun · 55 km · 72 m/kmSimilar weather · Similar climbing · Same month
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