Idaho Transportation Department Logo Idaho Transportation Department   Highway Info
Winter Road Conditions
US 20 Whole Road 12 reports
Parma to Boise 3 reports
Mountain Home to Arco 4 reports
Arco to Idaho Falls 2 reports
Idaho Falls to Montana 4 reports
Reports on US 20
Map of Reports on US 20 Between US 95 (near Parma) and I-84 (near Caldwell). Expect dry pavements. Cloudy skies. Between I-84 (Caldwell) and I-184 (Boise). Expect dry pavements. Cloudy skies. Between Avenue A and University Drive (near Boise). The road is closed to traffic due to bridge construction work. A detour is in operation. Until October 1. Between I-84; ID 51 (Mountain Home) and Cat Creek Summit (26 miles west of the Fairfield area). Expect dry pavements. Cloudy skies. Look out for large animals on the roadway. Between Cat Creek Summit (26 miles west of the Fairfield area) and First Street West (Fairfield). Expect dry pavements. Weather conditions clear. Between First Street West (Fairfield) and ID 46 (16 miles west of the Carey area). Expect dry pavements. Weather conditions clear. Be ready for patchy fog. Between The Timmerman Rest Area (16 miles west of the Carey area) and Van Buren Boulevard (13 miles east of the Butte City area). Expect dry pavements. Weather conditions clear. Between Van Buren Boulevard (13 miles east of the Butte City area) and I-15; US 91 (Idaho Falls). Expect dry pavements. Cloudy skies. Be ready for patchy fog. Between I-15 (Idaho Falls) and Burton Road (2 miles west of the Rexburg area). Expect dry pavements. Cloudy skies. Look out for large animals on the roadway. Between 4300 West Road (2 miles west of the Rexburg area) and The South Ashton City Limits (6 miles west of the Ashton area). Expect dry pavements. Cloudy skies. Be ready for patchy fog. Between The South Ashton City Limits (6 miles west of the Ashton area) and Harriman State Park (2 miles west of the Island Park area). Expect dry pavements. Weather conditions clear. Be ready for patchy fog. Between Harriman State Park (2 miles west of the Island Park area) and The Montana State Line (3 miles east of the Island Park area). Look out for snow on the roadway. Be prepared for snow. Be prepared for gusty winds. Look out for drifting snow on the roadway.
US 20: Road closed to traffic, due to bridge construction work, detour in operation.
Google Static Map Image
State conditions legend State
Closure Closure
Public conditions legend Public
Weather warning legend Weather Warning