OCC - Elevation Profile, Aid Stations and Cutoffs
The OCC (Orsieres-Champex-Chamonix) is a 60km ultra-trail with around 3,500m of elevation gain, running from Orsieres in Switzerland to Chamonix in France during UTMB week. The overall cutoff is 14 hours 30 minutes, and the highest point of the redesigned 2026 course is the Tete de Balme at 2,321m.
Course profile
- Distance
- 60 km
- Elevation gain
- 3,500 m
- Elevation loss
- 3,380 m
- Highest point
- Tete de Balme (2,321 m)
- Cutoff
- 14h30
- Typical winning time
- ~5h
The 2026 edition starts in Orsieres on Thursday August 27 at 08:15 and follows a redesigned course: after Champex-Lac and Trient it climbs to the Col de Balme, crosses the new high point at the Tete de Balme, then passes the Col des Posettes before descending via Le Tour and Argentiere to the finish in Chamonix. Crew access is possible at Champex-Lac, La Giete, Trient, Le Tour, and Argentiere.
Data is approximate and courses change between editions - always verify against the official race guide.
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Plan against barriersElevation profile
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~2 weeks · peak ~5 h/week · 5 run + 1 strength days
For a 60 km race, aim for about 8 h/week at peak. Set your availability to 9 h/week in the app for the headroom to build there gradually.
Short timeline - the plan focuses on race-specific sharpening and taper rather than base building.
Typical structure for your volume - your live plan adjusts sessions inside each week.
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Aid stations and checkpoints
| Checkpoint | Km | Cumulative gain (m) | Cumulative loss (m) | Cutoff | Crew | Drop bag |
|---|---|---|---|---|---|---|
| Start - Orsieres | 0 | 0 | 0 | - | - | - |
| Champex-Lac | 7.3 | 620 | 70 | - | Yes | No |
| Plan de l'Au | 12.2 | 680 | 260 | Thu 11:15 | No | No |
| La Giete | 18.6 | 1,410 | 440 | - | Yes | No |
| Trient | 23.8 | 1,460 | 1,060 | Thu 14:15 | Yes | No |
| Col de Balme | 33.5 | 2,510 | 1,220 | Thu 17:30 | No | No |
| Tete de Balme | 35.2 | 2,630 | 1,240 | - | - | - |
| Col des Posettes | 41.8 | 2,940 | 1,860 | - | - | - |
| Le Tour | 46.8 | 3,010 | 2,450 | - | Yes | No |
| Argentiere | 50.2 | 3,070 | 2,730 | Thu 21:15 | Yes | No |
| Chamonix (Finish) | 60 | 3,500 | 3,380 | Thu 23:30 | Yes | No |
Data is approximate and courses change between editions - always verify against the official race guide. Source: official race guide, verified July 17, 2026 - Official race website
FAQ
How long is the OCC?
The OCC covers approximately 60km from Orsieres (Switzerland) through Champex-Lac and Trient to Chamonix (France), with around 3,500m of cumulative elevation gain.
How much elevation gain does the OCC have?
The OCC has around 3,500m of cumulative elevation gain over 60km, with the biggest climb rising from Trient to the Col de Balme and the Tete de Balme high point.
What is the cutoff time for the OCC?
The overall OCC cutoff is 14 hours 30 minutes, with intermediate time barriers at Plan de l'Au, Trient, Col de Balme, and Argentiere. Winning times are typically around 5 hours.
What is the highest point of the OCC?
The highest point of the 2026 OCC course is the Tete de Balme at 2,321m, a new passage between the Col de Balme and the Col des Posettes introduced with the 2026 course redesign.
How many aid stations does the OCC have and which allow crew?
The checkpoint table lists 9 major aid points between Orsieres and the finish in Chamonix. Crew access is allowed at Champex-Lac (7.3km), La Giete (18.6km), Trient (23.8km), Le Tour (46.8km), and Argentiere (50.2km).
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