Explore hiking trails around La Roche-sur-Grane, Rhône-Alpes. The best hike near La Roche-sur-Grane is La Châtaigneraie Loop via Les_Crottes, a 5.6 mile loop in Réserve naturelle des gorges de l'Ardèche. La Roche-sur-Grane has population 181.0.