Harmony Hill Nature Area Loop is a 4.3 mile moderately trafficked loop trail located near Downingtown, PA that features a great forest setting. The trail is good for all skill levels and primarily used for hiking. 4.3 miles 419 feet Loop kid friendly hiking forest Expand Map Sign up now to see this map! Reviews (0)Photos (0)Recordings (0)No one has reviewed this trail yet. Be the first!