Explore hiking trails around Portes-lès-Valence, Rhône-Alpes. The best hike near Portes-lès-Valence is La Châtaigneraie Loop via Les_Crottes, a 5.6 mile loop in Réserve naturelle des gorges de l'Ardèche. Portes-lès-Valence has population 10422.0.