The ultimate challenge for middle-distance enthusiasts.

The GT65 will cover a distance of around 66km and more than 2,599 meters of ascent.

The Grand Trail des Lacs et Châteaux had been selected for the organization of the 2025 Belgian Long Trail Championships , but it will also be a qualifier for the 2026 Trail World Championships .
The GT65, carrying a UTMB Index of 50K, will delight the most daring!

The 65 km is a magnificent gateway to ultra racing. It sets off in the early hours of the morning in the heart of the valleys, criss-crossing the hyper-technical, natural route.

A new ride longer than the marathon.

The Bayon and Warche valleys will amaze you with their unique landscapes: Bayon waterfall, quarry, Tros Marets valley, fens, fir trees, water towers, crest road, Nez de Napoléon, Robertville lake, stony ascent.

The GT65 route takes you into the heart of this special and typical natural environment, where you'll pass through sublime panoramas before reaching the famous Ovifat ski climb.
All you have to do is enjoy your performance as you cross the finish arch to the cheers of families and spectators.

A special atmosphere awaits you at GT65, where you can let your inner wolf run wild and unleash your wild side!