"State Route 20 (SR 20), also known alternately as the North-Cross Highway or the North Cascades Highway, is a state route in the state of Washington. It travels from an intersection with U.S. Route 101 (US 101) at Discovery Bay near Port Townsend to Newport at a junction with US 2 about 400 feet (120 m) from the Idaho state line. Although US 12 has a larger east\u2013west extent, SR 20 is the longest highway in Washington at 436.13 miles (701.88 km), only 5.3 miles (8.5 km) longer than US 12."@en . "East" . . . . "20" . . . . . "SR" . "West" . "701883.0"^^ . .