Joseph R. Walker was a mountain man and experienced scout. He established the segment of the California Trail, the primary route for the emigrants to the gold fields during the California gold rush, from Fort Hall, Idaho to the Truckee River. The Walker River and Walker Lake in Nevada were named for him by John C. Frémont.

Walker Lake is a natural lake in the Great Basin in western Nevada in the United States. It is 11 mi (17 km) long and 5 mi (8 km) wide, in northwestern Mineral County along the east side of the Wassuk Range, about 75 mi (120 km) southeast of Reno. The lake is fed from the north by the Walker River and has no natural outlet except absorption and evaporation. The community of Walker Lake is found along the southwest shore.