26 - La Petite Chartreuse
From 01/01 to 31/12. Navigable with no snow cover, subject to weather conditions. Check beforehand with the Tourist Office for up-to-date information on weather conditions.
This superb loop through the Chartreuse goes over no fewer than 4 mountain ridges - Pas de la Fosse, the north face of the Granier, Vallée des Entremonts and Pas du Frou from Corbel - and includes some breath-taking views.