 Upon entering the county, U.S. 250 descends into the Back Creek valley, whereafter it crosses the long ridge of Lantz mountain.The route then reaches the village of Hightown where it intersects Virginia State Route 640.Hightown marks the division between the watersheds of the James and Potomac Rivers, for the headwaters of the Jackson River, a tributary of the James, and the South Branch Potomac River are located near the village.