Thornton Gap, Virginia -- Enter/Exit Skyline Drive Thornton, Virginia was a big cheese in early Sperryville days. Nowdays his namesake provides the nexus to enter or exit Skyline Drive and the watershed marking the down-hill descent into the beautiful Shenandoah Valley. Warrenton to Timberville United States Route 211 is the scenic gateway to the Shenandoah National Park and the fabled Shenandoah Valley. Originating in Warrenton, Virginia, Rt. 211 takes you through some of the most scenic countryside you'll encounter in in one of the most beautiful parts of Virginia. You'll cross an expanse of rolling foot-hill countryside with pastures, cornfields, orchards and a growing crop of vineyards and wineries.