The MB Race was born in 2010 on the trails of Megève and Combloux. This mountain biking event, renowned for its races and routes that are as demanding as they are breathtaking, takes place in the territory of Mont-Blanc and Val d'Arly. Light on this extraordinary competition and its legendary courses!
Discover the MB Race, a benchmark event in the world of mountain biking
The MB Race is a famous mountain bike competition which takes place in the Pays du Mont-Blanc region. These events, intended for everyone, cross no less than 12 localities between Savoie and Haute-Savoie: Megève, Combloux, La Giettaz, Flumet, Praz-sur-Arly, Saint-Gervais, Sallanches... and many others.
With Mont-Blanc as a backdrop, this mountain biking event follows the most beautiful alpine trails in the area. Its routes also alternate between forest tracks and technical trails, to the delight of mountain bikers.
Since its inception, the MB Race has, after all, established itself as a reference in the world of MTB :
- both for its mythical mountain bike race – the MB Ultra Somfy – reputed to be the most difficult in the world
- only for its exceptional setting offering breathtaking panoramas.
Next edition of the MB Race
July 4-6, 2025
The toughest mountain bike race in the world
Since its inception and as mentioned at the outset, the MB Race has stood out in the landscape of MTB by including in its program a unique event of its kind: the MB Ultra Somfy, a one-day race, which became legendary over the years. With a record distance of 140 km and an elevation gain of 7 m, this flagship event of the MB Race had only one finisher in 000.
Considered today as the most demanding mountain bike race in the world, the MB Ultra Somfy is above all a personal challenge, a true inner battle. With a common start for the three courses (70 km, 100 km, 140 km) the participants in this extraordinary competition share a common objective: to cross the finish line of the queen distance of 140 km.
The courses of this plural MTB competition and intended for all
The MB Race offers several courses. The event is open to everyone, cycling enthusiasts or enthusiasts, young or old, with friends or family... there is something for everyone thanks to the different tests offered.
Discover the MTB Alpine Cup
The MTB Alpine Cup brings together four major marathon mountain bike events - whose the prestigious MB Ultra Somfy – all part of the UCI Marathons Series circuit. It's an unmissable event for mountain bike enthusiasts looking for extreme challenges and breathtaking panoramas.
With its 436 km of course and +17 m of cumulative elevation gain, this extraordinary competition represents both:
- a major challenge for mountain bike enthusiasts
- a unique opportunity to discover exceptional routes across the Alps.
The MTB Alpine Cup 2025 challenge, at a glance
4 tests
- Jura Bike Marathon | 71km 2750m D+ | May 18, 2025
- MB Race | 140 km 7000m D+ | July 5, 2025
- Grand Raid BCVS | 125 km 5000m D+ | September 6, 2025
- The Forester | 2900m elevation gain | September 21, 2025
Cumulative distance: +436 km
Approximate cumulative elevation gain: +17 D+
Prices and registrations
Registrations for the various races are made directly on the official race website.
Rules of the MB Race
Registration for one of the races implies acceptance of the MB Race rules. We invite you to carefully read the rules relating to each course, which includes all the useful and essential information for your participation.
You will find there in particular what is included in the registration, the compulsory equipment as well as the supporting documents requested to take the start, the methods of participation and the practical information of the event.
The regulations for each course are available on the official MB Race website.
Become a Volunteer
The MB Race experience is a unique experience to live, both as a participant and a volunteer. If you would like to join the big family of MB Race volunteers, you can indicate your availability by filling out the registration form on the event's website.
