The Stony Creek Rail Trail is approx. 18 miles. Its north of Harrisburg, PA near Interstate 81 at the first exit north of Interstate 78. The Appalachian Trail jumps on to it for 1/4 mile. The Rausch Gap shelter & campsite is there so you can make it a bike-camping trip. The forest is the St. Anthony Wilderness north of Fort Indiantown National Guard camp. There's a reservoir at the eastern end and the Susquehanna River at the other. There are a few other mountainbike trails in that area.