Black Lake is a reservoir located between Creston and Campti in North Louisiana. Water feeds into Black Lake from Black Lake Bayou, a watershed that extends from north of Gibsland in Bienville Parish and south to Clarence in Natchitoches Parish through the parishes of Claiborne, Webster, Bienville, Red River and Natchitoches. The elevation of the lake is . Louisiana Highway 9 runs across Black Lake. On the west side of Highway 9 the body of water is called Black Lake — the east is called Clear Lake or Clear Lake Bayou. The Clear Lake side is near another body of water: Saline Lake. Between Clear Lake and Saline Lake is the Alan Chiverly Dam, constructed in 1934. Road 1226 also extends between the lakes.