Greeson, Lake, reservoir (11 sq mi/28 sq km), Pike co., SW Ark., on Little Missouri R., 40 mi/64 km SW of Hot Springs; 34°09'N 93°43'W. Max. capacity 600,600 acre-ft. Formed by Narrows Dam (196 ft/60m high), built (1950) by Army Corps of Engineers for flood control, power generation, and recreation. Daisy St. Park on NE shore.