Stony Valley Trail features 28 miles of hiking trails near Dauphin/harrisburg, PA.
Take US-322 West out of Harrisburg and exit onto PA-225. Turn left onto Erie Street then right on Susquehanna Ave. Go about 4 and half miles and get onto Stony Creek Valley Road to the trailhead.
http://www.tripleblaze.com/trail.php?c=3&i=109