Cycling loop: Circuit des Entremonts

Le Pas du Frou ("affreux" en patois) domine le Guiers Vif (frontière départementale naturelle) du haut de ses 150 m en encorbellement. La route relie St Pierre d'Entremont à St Christophe sur Guiers.

In the heart of the Chartreuse Valley, hides the historical site of the Saint-Christophe Caves, a condensed cultural and natural heritage, ancestral passage of water and men.Guided tours of 2 caves and an ancient Roman road. Walks, hikes, prehistory game trails, caving activities, bar, store - you'll find what you're looking for on our site for an unforgettable day out with the whole family! Situated on the border between Savoie and Dauphiné, our site takes you on a tour of the Voie Sarde, an ancient Roman road redeveloped in the 17th century along a canyon-like gorge, and the 2 caves of Saint Christophe. The first invites you to take a meander through a meander full of giant potholes, while the second, a refuge according to legend for the famous smuggler Mandrin, can be crossed on a footbridge 20m above the ground, offering a panoramic view. Access to the caves is by guided tour only. In the reception area, a free permanent exhibition presents the Fru site, home to the first prehistoric men in the Chartreuse! To discover this prehistoric habitat, you can follow a 2h30 hike punctuated by 12 play points for the whole family: "Sur la piste d'Azil et Magda" (On the trail of Azil and Magda). Further information at www.grottes-saint-christophe.com/randonnees-et-balades For even more thrills, try acrospeleo, a combination of via ferrata and caving under the ceiling of the lower cave: www.grottes-saint-christophe.com/speleologie-et-acrospeleologie The bar and reception building are accessible to the motor-impaired. Light meals available in July and August. Visits to the caves and the Voie Sarde are not accessible to the motor-impaired.