Idaho Transportation Department Logo Idaho Transportation Department   Highway Info
Highways with Mountain Passes
US 12 1 mountain pass
I-15 2 mountain passes
US 20 2 mountain passes
ID 21 4 mountain passes
ID 28 1 mountain pass
ID 29 1 mountain pass
US 30 3 mountain passes
ID 31 1 mountain pass
ID 33 1 mountain pass
ID 36 1 mountain pass
ID 38 1 mountain pass
ID 55 1 mountain pass
ID 71 1 mountain pass
ID 75 1 mountain pass
I-84 1 mountain pass
ID 87 1 mountain pass
US 89 1 mountain pass
I-90 2 mountain passes
US 93 3 mountain passes
US 95 3 mountain passes
Mountain Passes—Statewide
Map of Statewide Between Exit 172: Sheep Station Road and Exit 180: Spenser Road (near Spencer). The right lane is blocked. The road is rough. Look out for potholes. Expect delays. Width limit 14'0". Between Highland Valley Summit (8 miles north of the Boise area) and Montgomery Street (Idaho City). Look out for a surface water hazard. Drive with extreme caution. Between Redfish Lake Road (near Stanley) and Squaw Creek Road (5 miles south of the Clayton area). Look out for large animals on the roadway. Between Challis Avenue; Sunset Street (Arco) and Spur Canyon Road (21 miles south of the Challis area). Watch for deer on the roadway. Look out for large animals on the roadway. Drive with extreme caution. Between US 20 (Arco) and 5850 West Road (15 miles north of the Mackay area). Look out for loose gravel on the roadway. Speed restrictions are in force. Expect delays. Between Main Street; Juniper Street and East 4600 North Road (3 miles north of the Buhl area). Look out for storm damage. Be aware of narrow lanes. There is a width limit in effect. Width limit 11'0". Between Beaver Creek Summit and Banks Lowman Road (25 to 28 miles north of the Idaho City area). There's been a rock fall. Drive with extreme caution. Look out for flaggers. Between Riverside Road and Johnstone Road (near Homedale). Bridge construction work is in progress. The roadway is reduced to one lane. Observe the signals. Expect delays. There is a width limit in effect. Speed restrictions are in force. Expect 10 - minute delays. Width limit 12'0". Speed limit 25 MPH. Until July 14, 2017 at about 7:00PM MDT. Between County Road 2C and Chinook Street (near Bonners Ferry). The road is rough. Between East Fork Road and Malm Gulch Road (6 to 8 miles north of the Clayton area). The road is rough.
ID 31: Pine Creek Pass
US 95: Lewiston Hill Summit
ID 36: Emigration Pass
ID 87: Reynolds Pass
US 93: Willow Creek Summit
US 95: White Bird Hill Summit
US 89: Geneva Summit
ID 55: Horseshoe Bend Hill Summit
I-15: Malad Summit
ID 21: Beaver Creek Summit
I-15: Monida Pass
US 12: Lolo Pass
ID 28: Gilmore Summit
ID 21: Banner Creek Summit
ID 29: Bannock Pass
US 30: Border Summit
US 93: Lost Trail Pass
ID 38: Holbrook Summit
ID 75: Galena Summit
US 20: Targee Pass
I-84: Sweetzer Summit
ID 21: Highland Valley Summit
I-90: Lookout Pass
ID 71: Brownlee Summit
ID 33: Teton Pass
ID 21: Mores Creek Summit
US 30: Georgetown Summit
I-90: Fourth of July Pass
US 95: Midvale Hill Summit
US 93: Nevada Line Pass
US 20: Cat Creek Summit
US 30: Fish Creek Summit
Google Static Map Image
Mountain Pass Mountain Pass