Carroll County is a United States county located in the southwestern part of the Commonwealth of Virginia. Roughly one fifth of the county lies in the Virginia Piedmont region, while the rest is part of the Appalachian Mountains. The Carroll county seat and largest town is Hillsville.The county was established in 1842 from part of Grayson County, and was officially named in honor of Charles Carroll, a signer of the Declaration of Independence. The borders of Carroll County were later expanded by including land from Patrick County. The total size of the county is 478 square miles (1,238 km2), and, as of the 2010 census, the population was 30,042.

Grayson County is a county located in the southwestern part of the Commonwealth of Virginia. As of the 2010 census, the population was 15,533. Its county seat is Independence. Mount Rogers, the state's highest peak at 5,729 feet (1,746 m), is in Grayson County.

Alleghany County () is a county located in the U.S. state of North Carolina. As of the 2010 census, the population was 11,155. Its county seat is Sparta.

Wytheville () is a town in, and the county seat of, Wythe County, in southwestern Virginia, United States. It is named after George Wythe, a signer of the United States Declaration of Independence, and mentor to Thomas Jefferson. Wytheville's population was 8,211 at the 2010 census. Interstate Highways 77 and 81 were constructed to intersect at the town, long a crossroads for travelers. During the American Civil War, Wytheville had a strategic importance. It was attacked in 1863 (Toland's Raid) and 1865 (Stoneman's 1865 Raid). The town is the birthplace of Edith Bolling Wilson, second wife of President Woodrow Wilson.