Washoe Valley, Nevada is a graphical region in the United States covering sixty-six square miles 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. New Washoe City and Washoe Lake are located in the valley. As of the 2000 Census, it had a population of 4,229. Its ZIP code is 89704, Which is often associated with Carson City. From 1857 to 1957, Theodore Winters (1823-1906) and his daughter, Neva Winters Sauer, owned and operated a 4,000-acre cattle farm and Thoroughbred stud with a quarter-mile training track. Among the ranch's famous horses was El Rio Rey, the American Champion Two-Year-Old Colt of 1889. The Winters Ranch and mansion in the valley is today listed on the National Register of Historic Places. Winters, California is named in honor of Theodore Winters.