Orsières-Champex-Chamonix (OCC)

Race completed

57 km Distance

3,500 m Climbing

8.1 Grit · Hardcore

46.0290° N, 7.1444° E © OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Climbing rate 61 m / km Mountain. Significant climbing. Steep sections will require power hiking.

Time limit 14 hours 14:44 min/km average. Generous. Walkable throughout for most of the field. More forgiving than 77% of 50K races. Measured against 1034 races of the same distance. Cut-off calculator →

Field size ~1,417 Very large. Congested start, busy aid stations.

DUV results for the 2025 edition (57km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.

Typical conditions, August

Daytime high 18°C

Night low 8°C

Rainfall Showers likely

Daylight 13 h 37 m of light

Regional 2001-2020 average for August — NASA POWER, grid elevation 1714 m. Not a forecast.

Results history

Year	Race	Finishers	Men's winner	Women's winner
2025	57km	1,417	Jim Walmsley · 05:00:35	Miao Yao · 05:35:13
2024	57km	1,534	Eli Hemming · 05:11:48	Miao Yao · 05:54:03
2023	56km	1,643	Stian Hovind Angermund · 04:42:40	Toni McCann · 05:18:21
2022	56km	1,162	Manuel Merillas Moledo · 05:18:29	Sheila Aviles Castano · 06:10:16
2021	56km	1,359	Jonathan Albon · 05:02:57	Blandine L'Hirondel · 05:45:08
2019	55km	1,474	Stian Hovind Angermund · 05:19:24	Ruth Charlotte Croft · 05:50:14
2018	55km	1,478	Erenjia Jia · 05:28:44	Ruth Charlotte Croft · 05:53:09
2017	55km	1,468	Marc Lauenstein · 05:19:34	Eli Gordon Rodriguez · 06:12:16
2016	55km	1,231	Xavier Thevenard · 05:28:37	Mercedes Arcos Zafra · 06:54:13
2015	53km	1,317	Marc Pinsach Rubirola · 05:21:38	Celia Chiron · 06:41:53

The field shrank 8% between 2024 (1,534) and 2025 (1,417). 32% of the 2025 field were women.

DUV results for the 2025 edition (57km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.

The Aid Station

Course-specific beta from the community

⛰️ terrain

This is a mountain course. Poles are highly recommended for the sustained climbs.

By UltraHub Expert

👟 gear

With trail terrain, choose a shoe with moderate cushioning for optimal performance.

By UltraHub Expert

Gear for this race

Chosen for 57 km of trail with 3,500 m of ascent.

Trail Running Shoes 61 m of climb per kilometre — grip and rock protection before cushioning.
Race Nutrition 57 km of self-supported fuelling between aid stations.
Hydration Vests Pole attachment and chest-strap stability on steep ground.
Trekking Poles 3,500 m of ascent to walk up.
Headlamps A 14 h limit puts you out there after dark.

Salomon

Sense Ride 5

RunRepeat found the Salomon Sense Ride 5 to have immaculate lockdown and a smooth and stable ride, making it confident on moderate trails and steep downhills. I…

★★★★★ 4.5

Brooks

Catamount 3

RunRepeat found the Brooks Catamount 3 to have a cozier upper that enhances the overall fit, though breathability and durability could be better. iRunFar noted…

★★★★★ 4.5

Skratch Labs