Explore hiking trails around Fontaine-sous-Montdidier, Picardie. The best hike near Fontaine-sous-Montdidier is Carrefour du Portail Loop via Route Toudouze, a 3.0 mile loop in Parc naturel régional Oise-Pays de France. Fontaine-sous-Montdidier has population 101.0.