South through fields and pastures, you come to the walled medieval town of Bonneval, nicknamed the Little Venice of the Beauce area. Finally comes the town of Châteaudun, a member of the association “Les Plus Beaux Détours de France”. Its historic centre and vast château look down dramatically on the Loir.
Follow quiet county and smaller country roads signposted “Vallée du Loir V47”. Leaving Illiers-Combray, be careful of traffic along the D941. This stage shares the way with the Saint-Jacques à Vélo route, hence the double signage. The very first stretch, between the Loir’s source at Saint-Éman and Illiers-Combray, is c.6km in length. Illiers Combray is also a stop on the Véloscénie (or Veloscenic) Paris-Mont-Saint-Michel cycle route.
Train line Illiers-Combray – Chartres – Paris. See schedule