The North Cascades Highway, or Highway 20, closed for the season Monday, according to the Washington State Department of Transportation.
The highway closed for the weekend Friday between milepost 134 at Ross Dam Trailhead and milepost 171 at the Silver Star Gate because of significant snowfall forecast over the weekend.
WSDOT crews reassessed conditions Monday and decided to keep the highway closed for the season, citing avalanche risk.
The stretch of the closure includes Rainy and Washington passes and dozens of avalanche paths between Whistler Mountain and Delany Ridge, according to WSDOT.