Chapelle-Guillaume is a pretty rural village of Perche Regional Nature Park, located at 1h30 of Paris (150 km), between Nogent-le-Rotrou and Brou (Exit 4 on the A11 from Paris and 5 from Le Mans) .
Near Châteaudun and Vendôme, the early castles of the Loire, the town lies on the border of the forest of Montmirail, where a remarkable castle and the pond du Plessis-Dorin.