Topaz Lake is a reservoir located in Douglas County, Nevada, close to the California border. The lake was created in 1922 with the construction of the Topaz Lake Dam. The area is known for its natural beauty and offers a range of recreational activities, including fishing, boating, camping, and hiking. The lake's hydrology is primarily supplied by the West Walker River, East Walker River, and other mountain streams. The lake's water level is affected by snowpack, which is provided by the Sierra Nevada Mountains. The area is also used for agricultural purposes, including hay and cattle ranching. Despite being a popular recreational area, Topaz Lake was also historically significant as it was used as a trading hub for Native Americans and early settlers.