 The Bullpasture Valley is drained throughout the county to the south by the Bullpasture River.The Cowpasture Valley, the easternmost valley in the county, is mostly drained to the south by the Cowpasture River, although a small portion to the north is drained by the South Fork South Branch Potomac River.Highland County contains parts of the George Washington National Forest concentrated mainly along the county's western and eastern borders.