Hard Rock Trail is a 4 mile out and back trail located near Boyds, Maryland that features a great forest setting. The trail is primarily used for hiking, walking, and trail running. 4.0 miles 557 feet Out & Back kid friendly hiking trail running walking forest Expand Map VIEW FULL MAP Sign up now to see this map! Reviews (0)Photos (0)Recordings (0)No one has reviewed this trail yet. Be the first!