Le Ronceveau is a mountain-bike rally that begins in Val de Virieu. Participants, both riders and walkers, depart from early morning in October. It is structured as a local event where individuals select their own distance: five routes are available, with the shortest being a 12 km easy option suitable for families.
The more challenging bike routes cover 25, 32, 38, and 44 km, allowing experienced VTT riders to choose a longer route without requiring beginners to use the same course. Registration is completed on-site. There are reduced VTT prices for FFCT members, a distinct price for walkers, and an optional meal for walkers. Children under 12 and licensed minors participate without charge, while other participants under 18 receive a discounted fee.