Washington (state) Washington (state) Washington (), officially the State of Washington, is a state in the Pacific Northwest region of the United States. Named for George Washington, the first president of the United States, the state was made out of the western part of the Washington Territory, which was ceded by Britain in 1846 in accordance with the Oregon Treaty in the settlement of the Oregon boundary dispute. It was admitted to the Union as the 42nd state in 1889. Olympia is the state capital; the state's largest city is Seattle. Washington is sometimes referred to as Washington State, to distinguish it
Washington State Route 10 Washington State Route 10 State Route 10 (SR 10) is a state highway in the U.S. state of Washington. The highway is a remnant of U.S. Route 10 (US 10) in Kittitas County, traveling southeast along the Yakima River from SR 970 in Teanaway to US 97 northwest of Ellensburg. SR 10 was established in 1970 as the successor to US 10 after the completion of I-90 across the Snoqualmie Pass in 1968. The highway was previously part of State Road 3 from 1923 to 1937 and Primary State Highway 3 (PSH 3) until the 1964 highway renumbering. SR 10