Two highways in the U.S. state of Washington have been named State Road 1: State Road 1 (Washington 1905-1913), the White River-Natches Road State Road 1 (Washington 1923-1937), the Pacific Highway; became Primary State Highway 1 until 1970 It has also been stated that the Cascade Wagon Road had this number,Washington State Department of Transportation, North Cascades Passes: Birth of a Highway , accessed March 2008 but it was SR 13 from 1907 to 1915, PSH 17 from 1937 to 1961, and unnumbered at other times.
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