 SR 18 enters Alleghany County and passes through the hamlets of Potts Creek, Jordan Mines, and Boiling Spring.At the state highway's final crossing of Potts Creek just south of its confluence with the Jackson River, the highway enters the city of Covington and becomes Indian Valley Road.At its intersection with Pitzer Ridge Road at the former site of Fort Carpenter, SR 18 becomes Carpenter Drive and crosses the Jackson River.