Rondje Parc naturel régional du Vercors en L'Isère

The ride

Roll out of Romans-sur-Isère and follow the route past the La Joyeuse river, then on to the Château de Chatillon castle. Next you cross the L'Isère river before riding through the Vercors nature reserve, with the Herbasse river rounding out the loop. It's 80.1 km with 641 m of climbing, and the whole way is paved. Back to Romans-sur-Isère to finish.