SR 20 North Cascades Highway between milepost 134 and 178 (Ross Dam Trailhead to Early Winters gate), is closed for the winter as of Nov. 8. Spring clearing work begins March 27. Clearing work typically takes 6-8 weeks.
From 8:30 a.m. until 10:00 a.m. on Tuesday, March 28, westbound traffic on SR 20 will alternate through a single lane from milepost 44.07 (just south of Taggert Quarry Road) to milepost 43.95 (Deception Road).