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 landscapes, and is part of the Cascade Loop, a 400-mile driving tour through the Cascades.
We close the North Cascades Highway in the winter when snow and avalanche danger threatens the safety of drivers and maintenance crews. We close the highway on the west at milepost 134, east of Diablo, and on the east at milepost 170, 14 miles west of Mazama. On average, we usually close the highway between late November and early December and reopen it in the spring between late March and early May.
Current pass driving conditions
How can I get more information?
Contact:
Communications Jeff Adamson
2830 Euclid Ave / P.O. Box 98
Wenatchee, WA 98807
Phone: 509-667-2815
E-mail: AdamsoJ@wsdot.wa.gov
Communications Dustin Terpening
1043 Goldenrod Road, Suite 101
Burlington, WA 98233-3415
Phone: 360-757-5997
E-mail: Terpenid@wsdot.wa.gov
North Cascades Highway e-mail updates
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