OCS Pyrénées Ariégeoises
📍 Occitanie, France
roadgravelmtb
Date
5–7 September 2026
Distance
350km · 150km
Elevation
8,000 m
Difficulty
mtb
MB Race
Mont-Blanc, France · 3–5 July 2026
Difficulty: 5/5 — Brutal
Covering up to 140 km with a massive 7,000 meters of climbing, the MB Race is a legendary alpine mountain bike event set against the backdrop of Mont-Blanc. It is widely recognized as one of the most grueling single-day mountain bike marathons on the planet.
Visit official site →- Distances
- 20km · 35km · 55km · 70km · 100km · 140km
- Elevation
- 7,000 m
- Surface
- singletrack, dirt
- Typical W/kg
- 4–5.5
Rider fit
Who it's for
This event is designed for elite marathon racers and highly experienced ultra-endurance mountain bikers who want to conquer the ultimate physical challenge.
Who will struggle
Riders without exceptional climbing stamina, technical descending skills, or the mental fortitude to handle extreme mountain elevation will struggle to finish.
Training focus
Preparation must prioritize high-volume aerobic endurance, long-duration alpine climbing simulations, and technical singletrack handling under fatigue.
Are you ready for this race?
Compare your W/kg to see how you stack up against this race's typical level — and which races fit you best right now.
FAQs
What are the main distance options for the MB Ultra Somfy?+
The flagship MB Ultra Somfy offers three sequential distance options of 70 km, 100 km, and 140 km on a single-day course.
Where is the event village and main hub located?+
The central event village is situated in Megève at the Palais des Sports car park, hosting the finish line, bib pickup, and exhibitors.
Are there secondary locations used during the event?+
Yes, Combloux serves as a secondary village, hosting children's races and select race departures.
Are there shorter or less intense race categories available?+
Yes, riders can choose the MB Explore with distances of 20, 35, or 55 km, as well as e-bike tours, kids' events, and enduro options.
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OCS Pyrénées Ariégeoises
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