 US 2 leaves Washington at the Idaho state line, located along SR 41 in Newport and Idaho State Highway 41 (ID-41) in Oldtown, Idaho.The present route of US 2 follows several wagon roads that were built in the late 19th century by local railroad companies, including the Stevens Pass Highway along the Skykomish River.The state of Washington began maintaining sections of what would become US 2 with the extension of State Road 7 in 1909, from Pashastin to Spokane on the Sunset Highway and later State Road 2.