The Washoe Valley is a geographical region in the United States covering 66 square miles (170 km2) in southern Washoe County in the state of Nevada. Located between Reno and Carson City, it is named for the Washoe people, Native Americans who lived there before the arrival of Europeans. Slide Mountain and Mount Rose overlook the valley from the west.

Slide Mountain is a 9,702-foot (2,957 m) peak in the Carson Range near Reno, in Washoe County, Nevada. From the summit of Slide Mountain, Lake Tahoe, Washoe Lake, Carson Valley, and the city of Reno can be viewed.