Explore hiking trails around Saint-Germer-de-Fly, Picardie. The best hike near Saint-Germer-de-Fly is Centre aquatique Youri Gagarine via Boulevard Youri Gagarine and Rue du Nord, a 4.0 mile out and back trail in Butte des Châtaigniers. Saint-Germer-de-Fly has population 1690.0.