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Mountain Passes—Statewide
Map of Statewide Between Exit 114 (5 miles west of the Glenns Ferry area) and Exit 121 (near Glenns Ferry). The road is being reconstructed. Eastbound traffic. The right lane is closed. Westbound traffic. The left lane is closed. Width limit 14'0". Speed limit 65 MPH. Until August 21, 2021 at about 11:59PM MDT. 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 MDT to 5:00AM MDT daily. Until May 15, 2021 at about 6:00PM MDT. 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 Smith's Ferry Drive - High Valley Road and Round Valley Road (13 miles south of the Cascade area). Major road construction work is in progress. Until May 27, 2021 at about 11:59PM MDT. 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 Lava Lake Road (16 miles north of the Carey area) and US 20 (Arco). 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 Round Valley Road (10 miles south of the Cascade area) and Lenora Street (McCall). The road is rough. Look out for potholes. Drive carefully. 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 Smith's Ferry Drive - High Valley Road and Round Valley Road (13 miles south of the Cascade area). The road is closed to traffic. From 10:00AM MDT to 2:00PM MDT on Monday, Tuesday, Wednesday and Thursday. Until May 27, 2021 at about 2:00PM MDT. Between US 93 (Arco) and New Sweden School Road (near Idaho Falls). Look out for mobile maintenance operations. Look out for flaggers. A pilot car is in operation. Drive with extreme caution. Prepare to stop. Between US 20 (Arco) and Hammond Lane (near Challis). Look out for large animals on the roadway.
ID 75: Galena
US 12: Lolo Pass
US 89: Geneva
ID 29: Bannock Pass
ID 21: Highland Valley
ID 55: Horseshoe Bend Hill
ID 31: Pine Creek Pass
US 93: Willow Creek
US 30: Border
ID 38: Holbrook
US 95: White Bird Hill
US 20: Cat Creek
I-84: Sweetzer
US 93: Nevada Line Pass
ID 28: Gilmore
ID 21: Mores Creek
US 20: Targee Pass
US 95: Midvale Hill
US 30: Georgetown
ID 33: Teton Pass
I-90: Fourth of July Pass
I-90: Lookout Pass
I-15: Monida Pass
ID 87: Reynolds Pass
ID 21: Banner Creek
US 95: Lewiston Hill
I-15: Malad
US 30: Fish Creek
ID 71: Brownlee
ID 21: Beaver Creek
US 93: Lost Trail Pass
ID 36: Emigration Pass
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Mountain Pass Mountain Pass