La Ronde Givrée is a 60 km relay race in Castres, southwest France, where teams of four runners share the distance. The race begins at the Parc des Expositions de Castres, typically in the morning, with a limit of 450 teams.
The race was first held in 1983 and is organized by the local Coureurs de Fond de Castres. OMEPS Castres is listed as the event contact. Its format emphasizes a team day over a solo ultra: runners arrive with clubmates, friends, or workplace teams, and then divide the long winter course into four relay legs.