Explore hiking trails around Claye-Souilly, Île-de-France. The best hike near Claye-Souilly is La Grande Montagne (n°14) Loop via Circuit des 25 Bosses, a 9.0 mile loop in Aire de coopération de la réserve de biosphère du Pays de Fontainebleau. Claye-Souilly has population 12282.0.