The route then follows West Swift Run southeast to the hamlet of Swift Run, after which it reduces to two lanes and begins a curvaceous ascent of the Blue Ridge, cresting the mountain at Swift Run Gap at an elevation of 2365 feet , where the highway crosses the Appalachian Trail and has an intersection with the access road to the Skyline Drive, the north south highway through Shenandoah National Park, then descending to the Virginia Piedmont.