Courmayeur, Italy to Chamonix, France
The most technical of the UTMB series races. Traversing wild and remote alpine terrain on the south side of the Mont Blanc massif with steep scrambles, exposed ridgelines, and sustained high-altitude passages. Not for the faint of heart.
| Name | Mile | Elevation | Crew Access | Drop Bag | Cutoff |
|---|---|---|---|---|---|
| Col du Petit Saint-Bernard | 8.7 | 7,178 ft | No | No | — |
| Bourg-Saint-Maurice | 18.6 | 2,789 ft | Yes | Yes | — |
| Refuge du Ruitor | 27.3 | 7,546 ft | No | No | — |
| Cormet de Roselend | 34.8 | 6,398 ft | Yes | Yes | — |
| Les Chapieux | 43.5 | 5,085 ft | Yes | Yes | — |
| Les Contamines | 55.9 | 3,770 ft | Yes | Yes | — |
| Les Houches | 68.3 | 3,380 ft | Yes | Yes | — |
| Bellevue | 77.7 | 5,905 ft | No | No | — |
| La Flégère | 84.5 | 5,900 ft | Yes | No | — |
| Segment | Miles | Terrain | Difficulty | Notes |
|---|---|---|---|---|
| Courmayeur to Bourg-Saint-Maurice | 0–18.6 | mixed | hard | Col du Petit Saint-Bernard then massive descent. |
| Bourg-Saint-Maurice to Cormet de Roselend | 18.6–34.8 | climb | extreme | Remote high-altitude traverse. Technical scrambling. |
| Cormet de Roselend to Les Contamines | 34.8–55.9 | mixed | extreme | Col du Bonhomme. Night section for many runners. |
| Les Contamines to Chamonix | 55.9–90 | mixed | hard | Through Les Houches, final push over ridges to Chamonix. |
View the full interactive elevation profile, 3D course flyover, and race strategy tools on HARDN.