Join our newsletter for the latest routes, diaries, and more straight to your inbox.
Oops! Something went wrong while submitting the form. Try again.

Ultra-Trail du Mont-Blanc

OLEUS Origins

Location: France, Italy, and Switzerland

Type: Trail race

Difficulty: 💪💪💪💪

Distance: 170 km

Dates: Typically in August

The Ultra-Trail du Mont-Blanc, also known as UTMB, is a world-renowned trail running event that takes place in the picturesque setting of the French, Swiss, and Italian Alps. The race starts and finishes in the town of Chamonix in France, and takes runners through several high mountain passes, including the Col du Bonhomme, the Col de la Seigne, and the Col Ferret.  Spanning a massive 171 km with a staggering elevation gain of 10.040 m, UTMB is not for the faint-hearted. But for those who have the grit, determination, and love for trail running, this event is an absolute must. The competition draws thousands of runners from all corners of the globe, all vying for the title of UTMB champion.

What makes it unique?

Since its inception in 2003, the UTMB has become one of the most coveted events in the world of trail running. With a course that takes runners through three different countries, the UTMB is widely recognised as one of the ultimate tests of endurance.

But what truly sets the UTMB apart is its breathtaking scenery. The course takes runners through some of the most stunning mountain landscapes in the world, with vistas of Mont Blanc and the surrounding Alps that are simply awe-inspiring. The course also features picturesque villages and lush forests, providing a varied and unforgettable trail running experience.

Finally, let's not forget about the global community that the UTMB brings together. Trail runners from all over the world come together to tackle this epic challenge, creating a vibrant and supportive community that is truly unique. Whether you're an elite athlete or a recreational runner, the sense of camaraderie and shared passion for the sport is palpable throughout the event, making it a once-in-a-lifetime experience for all involved.

Image source: UTMB Mont-Blanc

How to prepare

Anticipate variable weather conditions

The weather in the Alps can be unpredictable, with conditions ranging from hot and sunny to cold and rainy within a matter of hours. Prepare for these variable conditions by packing appropriate gear, including rain jackets, warm layers, and sun protection.

Train for the altitude

The UTMB course takes runners through several mountain passes reaching over 2500 m. Avoid altitude sickness by arriving days before the race, giving your body time to adjust. You can also try altitude training masks to simulate the conditions you'll face during the race.

Join our newsletter for the latest routes, diaries, and more straight to your inbox.
Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form. Try again.
By subscribing you agree to with our Privacy Policy and provide consent to receive updates from our company.
© 2026 OLEUS. All right reserved.