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Mountain Passes—Central Idaho
Map of Central Idaho Between US 20 and Exit 38: I-84B Nampa; Garrity Blvd (near Nampa). Road construction work is in progress. The roadway is reduced to one lane. Speed restrictions are in force. There is a width limit in effect. Expect delays. The road is being repaved. There is work on the shoulder. Bridge construction work is in progress. Speed limit 55 MPH. Expect 10 - minute delays. Width limit 12'0". From 9:00PM MST to 5:00AM MST daily. Until January 28, 2021 at about 6:00AM MST. Between Thompson Creek Road (3 miles south of the Clayton area) and US 93 (20 miles north of the Clayton area). Look out for large animals on the roadway. Prepare to stop. Between US 95 and Sunnyslope Road (1 mile south of the Marsing area). Road construction work is in progress. There is work on the shoulder. Until February 15, 2021 at about 7:00PM MST. Between Johnson Road and McKim Creek Road (19 miles north of the Challis area). There is danger of a rock fall. Drive with extreme caution. Between Johnson Road and McKim Creek Road (19 miles north of the Challis area). There is danger of a rock fall. Drive with extreme caution. Between Johnson Road and McKim Creek Road (19 miles north of the Challis area). There is danger of a rock fall. Drive with extreme caution. Between Old Highway 91 and 2000 South Road; Menan Butte Road (13 to 15 miles west of the Rexburg area). Be aware of the animal crossing area. Drive with extreme caution. Between Redfish Lake Road (Stanley) and US 93 (20 miles north of the Clayton area). There is danger of a rock fall. Drive with extreme caution. Between ID 21 (Stanley) and Squaw Creek Road (5 miles south of the Clayton area). Look out for large animals on the roadway. Between Eighteenth Street and US 12; US Route 12 (Lewiston). The road is closed intermittently. The roadway is reduced to one lane. Expect delays. Look out for flaggers. Until January 31, 2021 at about 5:00AM PST. Between ID 128 and US 95 (Lewiston). The road is closed intermittently. The roadway is reduced to one lane. Expect delays. Look out for flaggers. Until January 31, 2021 at about 5:00AM PST. Between US 20 and Little Lost River Highway (28 to 34 miles west of the Mud Lake area). Look out for drifting snow on the roadway. Look out for ice on the roadway. Drive with extreme caution. Between US 20 and The Butte - Jefferson County Line (10 to 43 miles west of the Mud Lake area). Look out for large animals on the roadway. Between Salmon Avenue (Arco) and Brunt Road (24 miles west of the Idaho Falls area). Look out for large animals on the roadway. Between Lava Lake Road (16 miles north of the Carey area) and US 20 (Arco). Look out for large animals on the roadway. Between Melba Road and Lewis Lane (8 miles south of the Nampa area). Look out for potholes. Drive with extreme caution. Between McGowan Creek Road (13 miles south of the Challis area) and McKim Creek Road (20 miles north of the Challis area). Look out for large animals on the roadway. Between McGowan Creek Road (13 miles south of the Challis area) and McKim Creek Road (20 miles north of the Challis area). Look out for large animals on the roadway. Between McGowan Creek Road (13 miles south of the Challis area) and McKim Creek Road (20 miles north of the Challis area). Look out for large animals on the roadway. Between ID 55 (Eagle) and US 20; Glenwood Street (Garden City). Look out for rush hour traffic. Between US 20 (Arco) and Hammond Lane (near Challis). Look out for large animals on the roadway. Between Eleventh Avenue North Extension (5 miles east of the Caldwell area) and North Fox Run Avenue (near Eagle). Look out for rush hour traffic. Between I-84 and the end of I-184 (Boise). Look out for rush hour traffic. Between Cloverdale Road - Joplin Road and Eighth Street (Boise). Look out for rush hour traffic. Between I-84 (Meridian) and US 20 (Boise). Look out for rush hour traffic. Between Exit 28: 10th Street (Caldwell) and Exit 35: Northside Boulevard (Nampa). Look out for rush hour traffic. Between Exit 36 (Nampa) and Exit 44 (near Meridian). Look out for rush hour traffic.
ID 71: Brownlee
US 93: Willow Creek
I-15: Monida Pass
US 93: Lost Trail Pass
ID 21: Banner Creek
US 95: Lewiston Hill
US 95: Midvale Hill
ID 75: Galena
ID 21: Highland Valley
ID 21: Beaver Creek
US 12: Lolo Pass
ID 55: Horseshoe Bend Hill
ID 29: Bannock Pass
US 95: White Bird Hill
ID 28: Gilmore
US 20: Cat Creek
ID 21: Mores Creek
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Mountain Pass Mountain Pass