At Virts Corner east of Hogback Mountain, US 15 enters the town of Leesburg as South King Street. At SR 7 (Leesburg Bypass), US 15 Business continues straight into the downtown area while US 15 joins the eastern side of the four-lane divided bypass. US 15 and SR 7 meet the western end of SR 267 (Dulles Greenway) at a trumpet interchange before the two highways diverge at a partial cloverleaf interchange with SR 7 Business (Harry Byrd Highway) that contains a flyover ramp for westbound SR 7. US 15 reduces to two lanes shortly before it meets the northern end of US 15 Business (North King Street) west of Ball's Bluff Battlefield and National Cemetery. Just north of the business route, the highway intersects SR 655 (Whites Ferry Road), which serves White's Ferry, the last remaining ferry crossing of the Potomac River that connects Leesburg with Poolesville, Maryland. US 15 passes by the historic homes Rockland and Temple Hall and through the community of Lucketts, which is home to the historic Lucketts School. North of Lucketts, the U.S. Highway veers to the west and runs along the eastern flank of Furnace Mountain. The road meets SR 672, which provides access to Lovettsville, before crossing the Potomac River on the Point of Rocks Bridge, a camelback truss bridge, into the Maryland village of Point of Rocks.