Explore hiking trails around Milly-sur-Thérain, Picardie. The best hike near Milly-sur-Thérain 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. Milly-sur-Thérain has population 1840.0.