Roll out of Linas and follow the La Salmouille, L'Orge and La Renarde rivers before the château de Roinville comes into view. A second castle follows at Dépendance, then the route runs through the Parc naturel régional de la Haute Vallée de Chevreuse. Past the Château de Janvry and the Ehpad Korian, the road turns you back toward Linas. It's 82.5 km with 642 m of climbing, all of it on paved surface.
