The UTDS is back, with a fresh new vibe and a clear ambition: to offer you so much more than just a race.
TheNextVenture offers you a revitalized experience that goes beyond the trail itself: more immersive, more inspiring, and even more intense, bringing together runners, enthusiasts, supporters, and nature lovers around an event that will leave a lasting impression.
Come experience it for yourself and witness the rebirth of the Ultra Trail des Sources.
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Step into the legend of the Land of the Springs

The Ultra Trail des Sources (UTDS®) invites you to enjoy a unique experience in the heart of the Belgian Ardennes, in a pristine natural setting where dense forests, wild valleys, and authentic landscapes come together. Nestled in eastern Belgium, in the heart of the magnificent Pays des Sources, this event traverses iconic areas such as Spa, Theux, Stoumont, and Trois-Ponts, offering an exceptional playground for all trail running enthusiasts.

Designed to bring together runners of all levels, the UTDS now offers an expanded format with seven distances, allowing everyone to find their challenge. From the accessible and dynamic 10 km to the 160 km, reserved for the most seasoned ultra-trail runners, and including intermediate distances of 19 km, 27 km, 42 km, 73 km, and 100 km, each course has been designed to offer a natural progression and total immersion in nature.

Whether you’re looking for your first trail running experience or an extreme endurance challenge, each distance plunges you into an intense sporting adventure, where pushing your limits, pacing yourself, and connecting with nature take on their full meaning.

Participating in the UTDS is much more than just running. It’s about exploring a rich and wild region, feeling the power of the elements, sharing a profound human experience, and leaving with lasting memories.

Choose your distance, get ready… and come write your own story on the trails of the Pays des Sources.

On the course, the Ultra Trail des Sources is marked by Extratrail markers bearing a pink “UTDS®” sticker.