The MB Ultra Somfy is the flagship race of the event! Much more than a race, it’s above all a challenge against oneself… The grail for every participant taking part in the race is to become Finisher of the 140 km, the queen distance! And of the 1,500 participants taking part, only a few will succeed…
The course is divided into 3 distances: 70 km & 3500m D+| 100 km & 5000m D+ | 140 km & 7000m D+. After a joint start, riders can decide in due course whether to stop or continue to the final distance, joining the coveted Finisher’s Circle of the world’s toughest mountain bike race.
NEW – The MB Ultra Somfy will support the French XCM Elites and Masters Championships over the 70 km distance for both men and women!
The event has also been awarded the UCI XCM Hors Classe label for the 70km distance for both men and women.
Saturday, July 5, 2025
72 km
104,90 km
141,50 km
Friday, July 4th - 6pm
Palais des Sports parking lot - Megève
All runners must reach their starting area by 5.50 a.m., i.e. 10 minutes before the first start. Access to the airlocks will be from the rear. An explanatory email will be sent to participants.
This year, the 3 distances (70-100-140km) are used for the MTB Alpine Cup ranking, with points awarded according to the distance covered.
6h00 : Megève
Friday, July 4 - 2pm to 9pm
Palais des Sports parking lot - Megève
Praz sur Arly - 43,50km - 11h30 Megève - 72km - 14h00 Combloux - 104.90km - 16h30 Sous Col du Jaillet - 115km - 18h00 Ball Trap - 132km - 20h00
70 km for men and women
70 km: Megève
100 km: Combloux
140 km : Megève
Friday, July 4 - 2 to 5 p.m.
85€ + registration fee
This year's race is limited to 1,000 participants instead of 1,400, to ensure a smoother flow on the trails.
70 km for men and women
GPX tracks will be available here from Friday June 27, 2025.
To help you prepare, we’ve compiled the times at various points along the route of the 140 km finishers in 2025, as well as the mileages and time barriers for 2024.
Please note that the time barriers for 2024 were calculated for a 6:15 start. This year, the start will be at 6.00 am.
Km course 2024 | Km course 2025 | Location 2024 | Location 2025 | First pass participants finisher of the 140 km in 2024 (start at 6:15 a.m.) | Last passage participants finisher of the 140 km in 2024 (start at 6:15 a.m.) | Time barrier 2024 (start at 6h15 a.m.) | Time barrier 2025 (start at 6 a.m.) |
|---|---|---|---|---|---|---|---|
11,6 | 15,2 | Sous Col du Jaillet | Sous Col du Jaillet | 6:57am | 7:31am | ||
24,6 | 27,3 | La Giettaz | La Giettaz | 7:42am | 8:54am | ||
44 | 43,2 | Praz sur Arly | Praz sur Arly | 8:54am | 10:56am | 12am | 11:30am |
52,4 | 52,2 | Chevan | Chevan | 9:34am | 11:58am | ||
60,3 | 60,2 | Col de Very | Col de Very | 10:09am | 12:51pm | ||
71,9 | 71,9 | Megève | Megève | 10:37am | 12:51pm | 2:15pm | 2pm |
84 | 84,3 | Plateau de la Croix | Plateau de la Croix | 11:27am | 2:53pm | ||
92,9 | 92,9 | Avenaz du Mt D’Arbois | Avenaz du Mt D’Arbois | 12:07pm | 4:07pm | ||
105,3 | 105,3 | Megève | Combloux | 12:37pm | 4:38pm | 4:45pm | 4:30pm |
115,3 | 115,2 | Col du Jaillet | Col du Jaillet | 1:23pm | 6:10pm | 6:15pm | 6:00 pm |
121,8 | 121,6 | Mouille Rose | Mouille Rose | 1:54pm | 7:08pm | ||
138,5 | 132 | Parking Ball Trap | Parking Ball Trap | 2:46pm | 8:15pm | 8:15pm | 8:00pm |
141,75 | 141,5 | Megève | Megève | 3:29pm | 10:00pm |
Anyone wishing to take part in the MB Ultra Somfy race must have read the regulations carefully. By entering this race, each competitor certifies that he/she has read the regulations and agrees to abide by them.
All non-licensed participants must provide the organizers with a medical certificate stating that they have no medical contraindications to competitive mountain biking.
This year, we are entrusting the management of supporting documents to Dokeop. Click below to find out about the filing procedure and the requirements for supporting documents.
All licensed participants must present their 2025 license to the organizers. It is imperative that the license is valid on race day and bears the words “validated medical certificate” and “cycling”, particularly for FSGT or UFOLEP licenses.
This year, we are entrusting the management of supporting documents to Dokeop. Click below to find out about the filing procedure and the requirements for supporting documents.
The MB Ultra Somfy is open to all, non-licensed, FFC/UCI licensed, FSGT, FFTRI, UFOLEP. Categories are as follows:
ELITES (M & F) ages 19 to 34
M 35-39 (M & F) 35 to 39 years old
M 40-44 (M & F) 40 to 44 years old
M 45-49 (M & F) 45 to 49 years old
M 50-54 (M & F) 50 to 54 years old
M 55-59 (M & F) 55 to 59 years old
M 60-64 (M & F) 60 to 64 years old
M 64-69 (M & F) 64 to 69 years old
M 70 and + (M & F) 70 years and over
Age at 12/31/2025
These categories are exceptional due to the hosting of the French Marathon Championships.
For safety reasons, all runners taking part in the MB Ultra Somfy must carry the following with them throughout the course:
A lighting kit is recommended for participants taking part in the 140 km race.
Come and preview the 2025 MB Ultra Somfy course to prepare for your MB Finisher goal!
We propose to accompany you step by step in your preparation by tackling different themes which will play key roles in the achievement of your objectives. Training plan, physical and mental preparation, nutrition, recovery, effort management, equipment and much more will be part of the MB Camp program.
MB CAMP – June 7 and 8 2025
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