| Marathon du Mont Blanc | |
|---|---|
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| Date | June |
| Location |  Chamonix |
| Event type | SkyMarathon |
| Distance | 42 km / 2,730 m |
| Established | 2003 |
| Official site | Marathon du Mont Blanc |
The Marathon du Mont Blanc (Mont Blanc Marathon)[1] is an annual marathon distance (42.195 km) alpine trail running event held in Chamonix, France. The Marathon du Mont Blanc race is the titular event but the name also refers to the group of longer and shorter distance races one or more of which competitors can compete in over a three-day period starting on the last Friday in June.
The marathon was first run in June 2003, however the shorter distance 23 km du Mont-Blanc, which utilizes part of the same route as the marathon, has been run annually since 1979.