Explore hiking trails around Saint-Gervais-sur-Roubion, Rhône-Alpes. The best hike near Saint-Gervais-sur-Roubion is La Châtaigneraie Loop via Les_Crottes, a 5.6 mile loop in Réserve naturelle des gorges de l'Ardèche. Saint-Gervais-sur-Roubion has population 1084.0.