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 160 KM and 4630 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 some 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"...