Start in Marnans. Head towards Viriville then follow Pite Ville, Les Bajeaux and Camp de Chambaran to return to the starting point.

The immense Chambaran natural park is the highlight of the ride, which also takes you past a beautiful Romanesque church and France's oldest carillon.
Good plans : Monastic products: six kilometres from Roybon, the abbey of Chambaran is home to a community of Cistercian sisters, settled in the Chambaran area facing the Vercors. Until 2003, the nuns produced cheese that was renowned way beyond the region's borders. They have stopped production, but the community sells products from other monasteries including cheese, pâtés, beer, wine, honey, chocolate, cakes, painkiller balm and soap. The monastery shop is open on weekdays (except Tuesday) from 10:30am to 11:45am and from 2:45pm to 5:00pm, and on Sundays from 11:30am to 12:15pm and from 2:45pm to 5:00pm. www.chambarand.fr

Delicate passages : Note: the route passes through the Chambaran military camp. Access off marked routes is not permitted.

Admission fee : Free access.

Opening : From 01/01 to 31/12. Subject to favorable weather.

Area : Bièvre Isère