Snickers Gap, originally William's Gap, is a wind gap in the Blue Ridge Mountain on the border of Loudoun County and Clarke County in Virginia. The gap is traversed by Virginia State Route 7. The Appalachian Trail also passes across the gap. Bear's Den and Raven Rocks are adjacent to the gap. During the autumn bird migration the gap is a favored spot for birdwatchers to count and study the many raptors that follow the ridge on their way south.
At 1,056 feet (322 m) the gap is approximately 300 to 600 feet (91 to 180 m) below the adjacent ridge line and 400 to 600 feet (120 to 180 m) above the surrounding countryside. Due to the dwindling height of the Blue Ridge as it approaches the Potomac River, Snickers Gap is one of the lowest wind gaps of the ridge in Virginia, with only Manassas Gap and the adjacent Keyes Gap being lower. The gap connects the northern Virginia piedmont with the lower Shenandoah Valley and servers as a main thoroughfare between the two regions.