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 Holbrook Summit Road and Smith Road (17 to 18 miles west of the Malad City area). The roadway is reduced to one lane. A seal coat treatment has been applied. Look out for loose gravel on the roadway. Look out for flaggers. Speed restrictions are in force. Speed limit 45 MPH. Until August 22, 2017 at about 6:00PM MDT. Between Thatcher Road (8 miles west of the Grace area) and US 30 (4 miles east of the Grace area). The roadway is reduced to one lane. There are alternating lane closures. A seal coat treatment has been applied. Look out for loose gravel on the roadway. A pilot car is in operation. Look out for flaggers. Speed restrictions are in force. Speed limit 45 MPH. Until August 22, 2017 at about 6:00PM MDT. Between US 30; Second Street South and The Wyoming State Line (52 miles east of the Soda Springs area). The roadway is reduced to one lane. There are alternating lane closures. A seal coat treatment has been applied. Look out for loose gravel on the roadway. A pilot car is in operation. Look out for flaggers. Consider using an alternate route. Speed restrictions are in force. Speed limit 45 MPH. Until August 22, 2017 at about 6:00PM MDT. Between Potters Road (3 miles east of the Lava Hot Springs area) and Third West Street (Soda Springs). The roadway is reduced to one lane. A seal coat treatment has been applied. Look out for loose gravel on the roadway. Look out for flaggers. Speed restrictions are in force. Speed limit 45 MPH. Until August 22, 2017 at about 6:00PM MDT. Between Rock Creek Road and The Timmerman Rest Area (18 miles west of the Carey area). Look out for long term road construction work. Bridge construction work is in progress. The roadway is reduced to one lane. Expect delays. Look out for temporary traffic lights. Speed restrictions are in force. There is a width limit in effect. Expect 5 - minute delays. Speed limit 35 MPH. Width limit 12'0". Until November 30, 2017 at about 5:00PM MDT. Between Grandview Drive and Frontage Road (near Driggs). Water main work is in progress. Road maintenance work is in progress. Until October 13, 2017 at about 6:00PM MDT. Between Iest Road and US 20 (1 mile south of the Parma area). The road is closed to traffic. Bridge construction work is in progress. Speed restrictions are in force. The intersecting road is closed. Speed limit 45 MPH. Until December 1, 2017 at about 7:00PM MDT. Between Exit 222: I-86 and Exit 216: ID 25; ID 77 (6 to 7 miles east of the Heyburn area). Bridge maintenance work is in progress. The bridge is closed. There is a width limit in effect. Speed restrictions are in force. Follow the local detour. Speed limit 65 MPH. Width limit 15'0". Until August 18, 2017 at about 5:00PM MDT. Between Exit 13: 4th Street and Exit 15: Sherman Avenue (near Coeur d'Alene). Look out for long term road construction work. The roadway is reduced to two lanes. There is a width limit in effect. Speed limit 55 MPH. Width limit 15'0". Between West Pine Creek Road (8 miles east of the Swan Valley area) and 200 West Road (1 mile west of the Victor area). The roadway is reduced to one lane. Road maintenance work is in progress. Look out for flaggers. For the next half day. Between Challis Avenue; Sunset Street (Arco) and Spar 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 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 County Road 2C and Chinook Street (near Bonners Ferry). The road is rough. Between Redfish Lake Road (near Stanley) and Squaw Creek Road (5 miles south of the Clayton area). There is danger of a rock fall. Between Idaho Street and Vollmer Loop (near American Falls). The roadway is reduced to one lane. The right lane is closed. There is work on the shoulder. Speed restrictions are in force. There is a width limit in effect. Speed limit 55 MPH. Width limit 12'0". From 4:00AM MDT to 4:00PM MDT on weekdays. Until September 1, 2017 at about 6:00PM MDT. Between Exit 172: Sheep Station Road (1 mile south of the Spencer area) and Exit 180: Spenser Road (Spencer). The right lane is closed. The road is rough. There is work on the shoulder. Reduce your speed. Observe speed limits. There is a width limit in effect. Speed limit 65 MPH. For the next five months. Between US 30 (1 mile south of the Inkom area) and Exit 67: US 30; Interstate 15 Business (near Pocatello). The roadway is reduced to one lane. A lane is closed intermittently. There is work on the shoulder. People are working in the median. Speed restrictions are in force. There is a width limit in effect. Speed limit 70 MPH. Width limit 12'0". Until October 16, 2017 at about 11:59PM MDT. Between Exit 74: Simco Road (2 miles west of the Mountain Home area) and Exit 120: Bannock Avenue (4 miles west of the Glenns Ferry area). Look out for mobile maintenance operations. The roadway is reduced to one lane. Speed restrictions are in force. Speed limit 65 MPH. From 4:00AM MDT to 2:00PM MDT on weekdays. Until August 3, 2017 at about 4:00PM MDT.
ID 21: Banner Creek Summit
US 30: Georgetown Summit
US 89: Geneva Summit
ID 29: Bannock Pass
US 20: Targee Pass
ID 21: Highland Valley Summit
US 93: Lost Trail Pass
ID 75: Galena Summit
US 12: Lolo Pass
ID 87: Reynolds Pass
ID 36: Emigration Pass
US 95: Midvale Hill Summit
I-15: Monida Pass
ID 71: Brownlee Summit
ID 21: Mores Creek Summit
ID 31: Pine Creek Pass
I-15: Malad Summit
ID 38: Holbrook Summit
US 30: Fish Creek Summit
US 93: Nevada Line Pass
I-84: Sweetzer Summit
ID 28: Gilmore Summit
ID 55: Horseshoe Bend Hill Summit
US 95: Lewiston Hill Summit
US 95: White Bird Hill Summit
I-90: Fourth of July Pass
US 20: Cat Creek Summit
ID 21: Beaver Creek Summit
US 93: Willow Creek Summit
ID 33: Teton Pass
I-90: Lookout Pass
US 30: Border Summit
Google Static Map Image
Mountain Pass Mountain Pass