|Location||Pulaski County, Virginia, USA|
|Primary inflows||New River|
|Primary outflows||New River|
|Basin countries||United States|
|Max. length||21 mi (34 km)|
|Surface area||4,500 acres (1,800 ha)|
Claytor Lake in Pulaski County, Virginia, is a 4,500 acre (18 km²), 21 mile (34 km) long reservoir on the New River created for a hydroelectric project of Appalachian Power Company. It is named for W. Graham Claytor, Sr. (1886–1971) of Roanoke, Virginia, a vice president of Appalachian Power who had supervised construction of the dam and creation of the lake.
Claytor Lake was formed when Appalachian Power Company built the Claytor Dam on the New River, just south of Radford, Virginia, in 1939. The gravity concrete dam is 139 feet high and impounds a normal capacity of 232,000 acre-feet. The plant is the largest of the power company's 12 hydroelectric plants, with a total generating capacity of 83,000 kilowatts.
In early 1944, the people of the surrounding area expressed an interest in the establishment of a state park on the new lake. The idea continued to grow and in 1946 private citizens and businesses from Pulaski, Radford and Blacksburg raised the money needed to purchase 437 acres (1.77 km2) from Appalachian Power. This land was given to the state to be developed as Claytor Lake State Park.
Hiwassee Trestle, on the New River Trail, a former railroad line which is now a rail trail, crosses Claytor Lake, and is part of the linear New River Trail State Park. The bridge was built in 1931 by Virginia Bridge and Iron Co. of Roanoke, a subsidiary of the Norfolk and Western Railway. The trestle is at 951 ft (290 m) long.
Popular activities at Claytor Lake include powerboating, sailing and various watersports.
Fishing has also become a major attraction at Claytor Lake. The most plentiful fish in the lake are bluegill, a form of sunfish. Most commonly they are in the 6" to 8" (15–20 cm) range and weigh less than a pound. Catfish are also popular in Claytor Lake, some of them getting quite large (well over 50 lb (22 kg)). The main sporting varieties are largemouth bass, smallmouth bass and striped bass. Large and small mouth bass fishing tournaments are a regular seasonal event at Claytor Lake with weights of 15 to 20 lb (7 to 9 kg) per fisherman being an average winning catch. All tournament fishing is catch and release and most is done by local clubs. Striped bass fishing occurs year round with various techniques. The average "striper" (as they are commonly known) is about 8 lb (4 kg) but catches close to 30 lb (14 kg) have been reported.
Several high cliffs of shale rock ring the lake coastline. This material is loose and unstable, and therefore, climbing is not permitted although many people (unlawfully) climb and jump from these cliffs into the lake below.