Explore hiking trails around Saint-Jean-lès-Longuyon, Lorraine. The best hike near Saint-Jean-lès-Longuyon is Le Jardinet Loop via Rue d'Hérissart and Rue de Membre, a 5.7 mile loop in Parc naturel Ardenne méridionale. Saint-Jean-lès-Longuyon has population 412.0.