High Quality Content by WIKIPEDIA articles! The Walker River is a river in west central Nevada in the United States, approximately 62 miles (100 km) long. It drains an arid portion of the Great Basin southeast of Reno, with a watershed that extends into the Sierra Nevada mountains. It flows within an enclosed basin, providing the principal inflow of Walker Lake as well as Topaz Lake (West Fork). The river was named for explorer Joseph Reddeford Walker. Its average discharge is about 360 cubic feet per second (10 m3/s).