North Cascades Highway (SR20) over Washington Pass is Closed for the season

As of Nov. 18, SR 20 North Cascades Highway is closed for the season between Ross Dam trailhead (milepost 134) on the west side and Silver Star gate on the east side (milepost 171) due to adverse conditions and avalanche risk.

Winter Closure Information

The North Cascades receive abundant snowfall each year, causing Highway 20 to close for the season in late fall/early winter, and reopen in spring, depending on conditions. The closure is from milepost 171 (west of Mazama) to milepost 134 (east of Diablo). This means our Loop becomes more of a crescent, and travelers should schedule accordingly.

Learn more at https://wsdot.com/travel/real-time/mountainpasses/north-cascade-hwy

To see historic closure dates/opening dates, click here: https://wsdot.wa.gov/travel/roads-bridges/mountain-pass-closure-and-opening-dates

Stevens Pass Road Alerts

Be sure to check the road conditions when traveling over Stevens Pass from the west side to the east side of the Cascade Loop:

https://wsdot.com/travel/real-time/mountainpasses/Stevens