Roll out of Sorigny and follow the Indre and Échandon rivers before the castles start coming: Esvres, la Michelinière, Reignac and des Etangs, each announced by its towers along the way. The loop runs 88.2 km with 354 m of climbing, almost all of it on paved surface. Count the châteaux as you pass and let the rivers carry you back to where you started.
