Washington State Route 20

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Image:WA-20.svg

State Route 20

RCW 47.17.080

Image:Map-WA-20.svg

Length:

436.55 mi (702.55 km)

West end:

Image:US 101.svg US 101 in Discovery Bay

Major
junctions:

Image:WA-19.svg SR 19 near Port Townsend
Image:WA-525.svg SR 525 near Coupeville
Image:Spur plate.svg
Image:WA-20.svg SR 20 Spur near Anacortes
Image:WA-536.svg SR 536 near Burlington
Image:I-5.svg I-5 in Burlington
Image:WA-9.svg SR 9 through Sedro-Woolley
Image:US 97.svg US 97 around Okanogan-Omak
Image:WA-21.svg SR 21 in Republic
Image:US 395.svg US 395 in Colville
Image:WA-31.svg SR 31 in Tiger

East end:

Image:US 2.svg US 2 in Newport

Numbered highways in Washington
< Image:WA-19.svg SR 19		SR 21 Image:WA-21.svg >
Interstates - U.S. Routes - State Routes (Pre-1964)

Image:Washington Highway 20 North Cascades.jpg

North Cascades Highway

State Route 20, also known as SR-20 or North Cascades Highway, is a State Highway (Route) in Washington. It travels from an intersection with U.S. Route 101 at Discovery Bay near Port Townsend to Newport at a junction with U.S. Route 2 about 400 feet (122 m) from the Idaho state line.

1 Route description
- 1.1 Annual closure
2 Child routes
3 References
4 External links

[edit] Route description

SR-20 begins in Discovery Bay, Washington at U.S. Route 101 and goes north to Port Townsend. It is connected via a ferry into Island County. From Island County, the route continues into Skagit County, crosses the Cascade Mountains by means of Washington Pass into Eastern Washington, and terminates in Newport, Washington near the Idaho border. The highway opened in September 1972 and has been called "The Most Beautiful Mountain Highway in the State of Washington."^[1] U.S. Route 2 has a larger east–west extent, but SR-20 is the longest highway in Washington at 436.55 miles (702.6 km).^[2]

Image:State Route 20.png

Probability chart for first opening/final closing dates.^[3]

[edit] Annual closure

SR-20 is one of only three State Routes in Washington that have portions closed in the winter (the others being State Route 410 and State Route 123). Washington Pass annually receives several feet of snow throughout the winter, and is prone to avalanches leaving over 20 feet of snow on the road.

For fall 1972 to spring 2007 inclusive, the median first open date was April 20. The median final closure date was November 25. During the drought of the winter of 1976–1977, the highway was not closed.^[3]

[edit] Child routes

State Route 20 Business (1973-present)
State Route 20 Spur (1973-present)

[edit] References

^ Gulick, Bill. A Traveler's History of Washington. Caxton Press, 1996. ISBN 0-8700-4371-4. p. 333
^ State Route 20. Highways of Washington State (2007-07-31). Retrieved on 2007-10-15.
^ ^a ^b SR 20 - North Cascades Highway - Opening and Closing History. North Cascades Passes. Washington State Department of Transportation (October 2007). Retrieved on 2007-10-15.