Roll out of Saint-Hilaire-sur-Yerre and follow the Le Loir river before the route brings you past the Château de Droué. Next up are the Château de Courtalain and its outbuildings, then a stretch along the L'Yerre. The loop closes past the Château de Montigny-le-Gannelon and back to the start village, with 80.4 km under your wheels.
