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 80 KM and 2350 m +, this event crosses the Spa, Theux, Stoumont & Trois-Ponts entities.

Dedicated to athletes who want to take part in an "ultra trail", 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"...