North cascades highway

Keywords: north cascades highway
Description: Washington State Department of Transportation - SR 20 - North Cascades Highway

State Route 20 is the northernmost route across the Cascade Mountain Range in Washington and is commonly referred to as the North Cascades Highway. This Scenic Byway offers travelers a wide array of beautiful vistas and is part of the Cascade Loop. a 400-mile driving tour through the Cascades. Take a virtual drive on the highway from your computer.

SR 20, the North Cascades Highway, is reduced to one lane near milepost 92 east of Concrete due to repair work on an unstable slope. Temporary signals are directing traffic through the open lane.

SR 20, the North Cascades Highway, closed for the season on Nov. 16, due to deep snow and avalanche hazard. The highway will reopen in spring 2016.

We close the North Cascades when weather, snow conditions and avalanche danger threaten the safety of drivers and our maintenance crews. We close the highway on the west side at milepost 134, east of Diablo, and on the east side at milepost 171, 14 miles west of Mazama. As the snow gets too deep for the plow truck, the east closure point is moved 7 miles down to the Early Winters Information Center at milepost 178. Avalanches typically close the highway between late November and mid December.

Starting November 1 until it closes and when it opens, we post the current North Cascades Pass conditions on our WSDOT mountain passes Web page as we do for all of the passes. May through October, pass conditions are only posted if there's a potential travel hazard.

For recreation purposes and while the highway is closed, or in the summer when the pass reports are suspended, you can find weather information with these links:

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North Cascades

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