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 three distances: 70 km & 3,000 m elevation gain | 100 km & 5,000 m elevation gain | 140 km & 7,000 m elevation gain. 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.
The event has also been awarded the UCI XCM Hors Classe label for the 70km distance for both men and women.
NEW: A new challenge awaits you! Combine MB Ultra and MB Explore to win exclusive gifts. To find out more about this new challenge, click here.
Saturday, July 4, 2026
72,4 km : Megève
105,4 km : Combloux
141,9 km : Megève
Friday, July 3 - 6pm
Parking du Palais des Sports - 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.
6h00 : Megève
Friday, July 3 - 6pm
Parking du Palais des Sports - Megève
Praz sur Arly - 42.8 km - 11:30 a.m.
Megève - 72.4 km - 2:00 p.m.
Combloux - 105.4 km - 4:30 p.m.
Sous Col du Jaillet - 73.5 miles - 6:00 p.m.
Ball Trap - 82.2 miles - 8:00 p.m.
This year, the 3 distances (70-100-140km) are used for the MTB Alpine Cup ranking, with points awarded according to the distance covered.
70 km : Megève
100 km : Combloux
140 km : Megève
Friday, July 3 - 2 to 5 p.m.
€89 + fees
This year, the race is limited to 1,000 participants to ensure smoother traffic flow on the trails.
The race is classified as UCI Hors Classe over a distance of 70 km for both men and women.
To help you prepare, we have compiled the times taken by finishers of the 140 km race in 2025 at various points along the route.
Km route 2026 | locations 2026 | First passage of participants finishing the 140 km race in 2025 (starting at 6:00 a.m.) | Last passage of participants finishing the 140 km race in 2025 (starting at 6:00 a.m.) | Time barrier 2026 (departure at 6:00 a.m.) |
|---|---|---|---|---|
15,2 | Sous Col du Jaillet | 6H48 | 7H29 | |
27,6 | La Giettaz | 7H27 | 8H51 | |
42,80 | Praz sur Arly | 8H18 | 10h17 | 11:30am |
52,60 | Refuge du Petit Tetras | 8h59 | 11h33 | |
60,60 | Col de Very | 9h31 | 12H27 | |
72,20 | Megève | 9h55 | 13h20 | 2pm |
84,60 | Plateau de la Croix | 10h35 | 14h18 | |
93,30 | Avenaz du Mt D’Arbois | 11h10 | 15h28 | |
105,20 | Combloux | 11h41 | 4:30pm | 4:30pm |
115,3 | Col du Jaillet | 12h35 | 6:00 pm | 6:00 pm |
121,8 | Mouille Rose | 13H05 | 19H01 | |
132,20 | Parking Ball Trap | 13h51 | 20h45 [Accord avec PC Course] | 8:00pm |
141,80 | Megève | 14h23 | 21h30 |
Come and check out the 2026 MB Ultra Somfy route to best 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 6 & 7, 2026
And to give you the best chance of success, we’ve put together all the advice you need to tackle a challenge like the MB Ultra Somfy!
We know that it’s sometimes complicated to prepare training on your own, or to know how to approach nutrition. A number of factors can play a decisive role on race day.
Find all our advice below
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:
ESPOIRS (M & F) 19 to 22 years old
SENIORS (M & F) 23 to 29 years old
Master 1 (M & F) 30 to 39 years old
Master 2 (M & F) 40 to 49 years old
Master 3 (M & F) 50 years old and over
Age as at 31 December 2026
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.
