OCC (Orsières-Champex-Chamonix) Course Profile

Orsières, Switzerland to Chamonix, France

• Distance: 34 miles
• Elevation Gain: 11,500 ft
• Elevation Loss: 11,800 ft
• High Point: 7,380 ft
• Low Point: 2,950 ft
• Time Limit: 14 hours 30 minutes
• Month: August
• Finisher Rate: ~80%

The shortest of the UTMB series races, but far from easy. A fast and furious course from Orsières through Champex-Lac to Chamonix with punchy climbs over Bovine and Tête aux Vents before the final descent.

Aid Stations

Name	Mile	Elevation	Crew Access	Drop Bag	Cutoff
Champex-Lac	6.8	4,790 ft	Yes	Yes	—
La Giète	12.5	5,900 ft	No	No	—
Trient	17.4	4,430 ft	Yes	No	—
Vallorcine	22.4	4,265 ft	Yes	No	—
La Flégère	29.2	5,900 ft	Yes	No	—

Course Segments

Segment	Miles	Terrain	Difficulty	Notes
Orsières to Champex-Lac	0–6.8	climb	moderate	Opening climb through Swiss countryside.
Champex-Lac to Trient	6.8–17.4	mixed	hard	Bovine climb is steep and relentless.
Trient to Chamonix	17.4–34	mixed	hard	Final climb to La Flégère then fast descent to Chamonix.

View the full interactive elevation profile, 3D course flyover, and race strategy tools on HARDN.