October 12th, 2025
Sports
Multipurpose room Rue des Écoles, 38500 La Buisse
In 2025, this will be the 17th edition of this outdoor sporting event! With its two flagship distances, the 10km and the iconic 21km for trail runners, and the new addition of a third distance: a 30km and 1m of elevation gain.
Program :
> TDB30: 30 km and 1200m D+ - Departure 8:30 a.m.
For the 30 km trail, runners will particularly enjoy covering a large part of the magnificent Grand Ratz plateau: forest tracks, technical singles, country roads, steep climbs with rolling tracks through the many hamlets of the plateau, superb views of the Grande Sure, the emblematic peak of the Pays Voironnais... The eye is constantly drawn to the variety of the landscape.
> TDB21: 21 km and 1 m D+ – departure 000 a.m. Solo or duo mode (you leave as a pair and arrive as a pair).
A historic event, the 21 km is a demanding race, with very steep trails and a route that climbs over part of the Grand Ratz plateau.
> Nature race B10: 10 km and 400 m D+ – departure 9:30 a.m.
This is the ideal route for discovering trail running! After a 2,6 km flat warm-up on the plain, three-quarters of the route stretches across the hillsides of La Buisse, offering a hilly and varied route through the town's many hamlets.
> Nordic walking/hiking: 10 km (new extended route) and 340 m D+ – departure 9:35 a.m. This walk is not timed.
A route halfway between plains and hillsides, which offers superb views of the Vercors, the Chambarans plain and the capital of Voironnais!
The first 550 runners to register will receive a prize!
Date
Every year, the 2nd or 3rd Sunday in October.
Rates
Full price :
> Hiking: €8,
> 10km Trail: €16,
> 21km Trail: €23,
> Trail: 30km: €30.
Reduced price :
> Hiking: €6,
> 10km Trail: €13,
> 21km Trail: €18,
> Trail: 30km: €25.
2025 prices.
Home of animals
- Animals accepted: not communicated