Thornton Gap is the site of the mountain crossing of U.S. Highway 211. It is located at the border of Page County and Rappahannock County. At Thornton Gap, there is an entry point for the bucolic Skyline Drive, which runs between Front Royal and the northern terminus with the Blue Ridge Parkway at Rockfish Gap. The Skyline Drive generally following the mountain ridge tops through the Shenandoah National Park, which has its headquarters near Thornton Gap in the Town of Luray. The Appalachian Trail also passes through Thornton Gap.