42km du Mont-Blanc
Where the 2027 race is now
- Not open yetGet an alert when it opens
- Race daySunday, June 27, 2027
- ResultsPosted here as soon as the timer has them
- Race day
- Jun 27, 2027 Sunday
- Distance
- 26.2 mi Marathon
- Entry
- Not open yet 2027 edition
- Boston qualifier
- No
- Live tracking
- Not yet Shown here race week
Quick facts
- Marathon-distance trail race in the Marathon du Mont-Blanc weekend.
- 42 km route with about 2,540 meters of elevation gain and loss.
- Limited to 2,300 runners with six start waves.
- Semi-autonomous race format with listed cutoff points.
- Livetrail live tracking and a 42 km results hub are available.
Course
The race covers 42 km with about 2,540 meters of elevation gain and loss. It is a semi-autonomous trail race with multiple feed stations, six start waves, and cutoff pressure across the route back to Chamonix.
Race-day weather
Late June in Chamonix can move from cool valley conditions to exposed mountain sun, wind, or storms. Runners should plan for changing alpine weather and slower effort on climbs and descents.
About the 42km du Mont-Blanc
42km du Mont-Blanc is the headline marathon-distance race of the Marathon du Mont-Blanc weekend. It is built for trail runners who want Chamonix terrain, big climbing, and a competitive mountain-running field rather than a road marathon.
Past 42km du Mont-Blanc dates and results
| Year | Date | Status | Results |
|---|---|---|---|
| 2027 | Sunday, June 27, 2027 | Upcoming | — |
| 2026 | Sunday, June 28, 2026 | Results available | Open results |
| 2025 | Sunday, June 29, 2025 | Results available | Open results |
| 2024 | Sunday, June 30, 2024 | Results available | Open results |
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42km du Mont-Blanc FAQ
When is the 42km du Mont-Blanc?
The 2027 42km du Mont-Blanc is on Sunday, June 27, 2027.
Is registration open for the 2027 42km du Mont-Blanc?
Registration for the 2027 42km du Mont-Blanc has not opened yet (checked November 2, 2026). View the official registration details at marathonmontblanc.fr.
How do I track a runner in the 42km du Mont-Blanc?
Most races publish tracking in race week. Marathon Scout links the official tracker on this page during race week, once the race or its timing provider publishes it.
Where can I find the 42km du Mont-Blanc results?
The 2026 results and earlier years are linked on the 42km du Mont-Blanc results page.
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