The Dan River flows 214 miles (344 km) in the U.S. states of North Carolina and Virginia. It rises in Patrick County, Virginia, and crosses the state border into Stokes County, North Carolina. It then flows into Rockingham County. From there it flows back into Virginia through Pittsylvania County before reentering North Carolina near the border between Caswell County and Rockingham County. It flows into northern Caswell County and then back into southern Virginia (briefly Pittsylvania County, then into Halifax County) and finally into Kerr Reservoir on the Roanoke River.