From Les Granges-le-Roi, this 80.7 km loop heads out past the Château de Sauvage and into the forêt de Rambouillet. Next come the Parc naturel régional de la Haute Vallée de Chevreuse and the Forêt de Dourdan, then the Forêt de Saint-Arnoult. On the way back you roll by the Manoir de Sainte-Mesme and the Château de Sainte-Mesme before returning to the start. The whole route is paved.
