Poor driving conditions from heavy snow, ice, wind and avalanche danger drove the state Department of Transportation to close Chinook and Cayuse passes around 8 a.m. Saturday.
DOT and the National Parks Service said in a news release that they will re-evaluate road conditions Monday and decide whether the passes can reopen or if they will be closed for the season.
Chinook Pass is closed from Morse Creek, five miles east of the summit, to Crystal Mountain Boulevard, about 12 miles northwest of the summit.
Cayuse Pass is closed within Mount Rainier National Park from the Cayuse Pass summit to Stevens Canyon Road.
DOT typically closes Chinook and Cayuse passes late November because of hazardous driving conditions.