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Sherman Pass Scenic Byway

State Route 20 marker

State Route 20
North Cascades Highway
A map of Washington, with the route of SR 20 highlighted in red.
Route information
Defined by RCW 47.17.080
Maintained by WSDOT
Length: 436.13 mi (701.88 km)
Mileage does not include ferry route
Existed: 1964 – present
Tourist
routes:
International Selkirk Loop, North Cascades Scenic Byway, Sherman Pass Scenic Byway
Major junctions
West end: US 101 in Discovery Bay
 
East end: US 2 in Newport
Location
Counties: Jefferson, Island, Skagit, Whatcom, Chelan, Okanogan, Ferry, Stevens, Pend Oreille
Highway system
SR 19 SR 21

State Route 20 Spur
Location: Anacortes, Washington
Existed: 1964–present

State Route 20 marker

State Route 20 (SR 20), also known as the North Cascades Highway, is a state highway that traverses the U.S. state of Washington. It is the state's longest highway, traveling 436 miles (702 km) across the northern areas of Washington, from U.S. Route 101 (US 101) at Discovery Bay on the Olympic Peninsula to US 2 near the Idaho state border in Newport. The highway travels across Whidbey Island, North Cascades National Park, the Okanagan Highland, the Kettle River Range, and the Selkirk Mountains. SR 20 connects several major north–south state highways, including Interstate 5 (I-5) in Burlington, US 97 through the OkanoganOmak area, SR 21 in Republic, and US 395 from Kettle Falls to Colville.


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Wikipedia

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