Orsières, Switzerland · Trail
Official site ↗OCC
Orsières–Champex–Chamonix: a fast, deep 60 km mountain race from Switzerland to the Chamonix finish line during UTMB week.
Completed August 27, 2026
The 2026 route reworked both ends of the course. The upper section between the Col de Balme and the Col des Posettes was new, topping out at 2,321 m, and the finish moved: from Les Chosalets the course followed the Arve along the south side of the valley, picked up the Petit Balcon Sud and took the traditional descent into the center of Chamonix. The race said neither change moved the total distance or the climb, and it ran this route as published, which is what its own race-day notice called the standard route.
women
- 1. Lauren Gregory6:08:07
- 2. Naomi Lang6:08:10
- 3. Sara Alonso6:09:11
men
- 1. Frédéric Tranchand5:10:08
- 2. Nashon Kiplimo5:14:37
- 3. Miguel Benitez5:17:43
Distances
- Distance
- 60 km (37 mi)
- Vert gain
- 3,500 m (11,500 ft)
- Cutoff
- 14 hr 30 min
Starts Thursday 08:15 from Orsières
| Distance | Vert gain | Cutoff | Notes |
|---|---|---|---|
| 60 km (37 mi) | 3,500 m (11,500 ft) | 14 hr 30 min | Starts Thursday 08:15 from Orsières |
About
The OCC runs from Orsières in the Swiss Valais up through Champex-Lac and along the final third of the UTMB course to Chamonix: about 60 kilometers with 3,500 meters of climbing. The 2026 route reworks the upper section with a new passage between Col de Balme and Col des Posettes, topping out at 2,321 meters.
As the shortest of the three headline races of UTMB week, it draws the fastest single-day mountain-running field of the season.
Course
From Orsières in the Swiss Valais up through Champex-Lac and onto the final third of the UTMB course: fast, runnable climbing with the descents into Trient, Vallorcine, and Chamonix.
How to register
Entry works like UTMB: Running Stones from UTMB World Series races buy tickets in the December lottery, with elite spots by UTMB Index.