Refine your search for walks in Col de Sonnaize (782m)
Grotte des Fées, Crête des Vachères, Grotte des Ussets and Crête de Mussan

A "wild" route at the start, two caves to visit and a magnificent panorama to admire from the Montagne de Mussan, covering a large part of the Vercors, make this hike well worth the effort.