The Ultra Trail des Sources (UTDS®) is an ultra-endurance running competition organized on a permanent marked route located in the Ardennes, East of Belgium (Europe). Cumulating 159 KM and 4150 m +, this event crosses the Spa, Theux, Stoumont, Trois-Ponts, Stavelot, Malmedy & Jalhay entities.

Dedicated to athletes who want to take part in an "ultra trail" and collect 5 ITRA points, it is also intended for people wishing to run this route, in relay, with a team of 2 to 4 runners.

An awesome experience to discover all the beauties of a raw and authentic nature and immerse yourself in a preserved natural environment, in the heart of the magnificent "Pays des Sources"...