 At Mount Olive Road, SR 678 turns back to the east-northeast, passing a succession of homes and through more open space, before curving to the north at the Hocking County Road 9 intersection.From here, SR 678 weaves through heavy woods, bending back to the northeast into an area of open space, prior to turning back to the north one final time before arriving at its terminal intersection at SR 180.No portion of SR 678 is included within the National Highway System.