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runner on the occ utmb mont blanc mountain trail

31st August 2023

OCC

The ultimate challenge for mid-distance ultra-runners, the OCC is the 50K category final for the UTMB World Series.

Race Category

ws50KM

Distance

55km

Elevation Gain

3425m

Start Location

Orsières

Start Time

08:15

Max Allowed Race Time

14 Hours 30 Minutes

THE LITTLE SWISS SISTER

The ultimate challenge for middle-distance runners, the OCC will start on a 55km course with 3,425 meters of positive elevation gain from Orsières, located in the south-western part of the canton of Valais in the Val d'Entremont.

This Swiss valley will amaze you with its unique landscapes: The OCC route will take you to the heart of this particular and typical nature before reaching Champex-Lac and Trient. You will then cross the Franco-Swiss border by the emblematic Balme pass and its sublime panorama on the Mont-Blanc massif. Once you have reached the last difficulty of the course and the ascent to La Flégère, you will only have to enjoy the descent and savor your performance by crossing the mythical finish arch in the center of Chamonix under the cheers of families and spectators.

THE LITTLE SWISS SISTER

A closer look at the course

All you need to know to participate in the OCC

All the information you need to know before starting an extraordinary adventure.

Regulations

Rules and Regulations

Check out the official OCC rules and regulations including registration process and fees, mandatory equipment, assistance policy, runner commitment and much more.

Registration conditions

To participate in the OCC, you must have a valid UTMB Index in the 20K, 50K, 100K or 100M categories and at least 1 Running Stone.

Repatriation insurance

Each competitor must have a personal accident insurance covering search and rescue costs in France and Switzerland.

Mandatory equipment

Check the list of mandatory equipment and the heatwave or extreme cold kits that can be activated depending on the weather conditions.

Medical Certificate

Each competitor must upload the medical certificate on their dashboard before May the 31st 2023.

Dive deep into the heart of the race

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