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 Banks Valley Road and Alton Road (5 to 11 miles east of the Montpelier area). The roadway is reduced to one lane. The road is being repaved. Look out for loose gravel on the roadway. Consider using an alternate route. Speed restrictions are in force. There is a width limit in effect. Speed limit 45 MPH. Width limit 12'0". From 8:00AM MDT to 8:00PM MDT on weekdays. Until July 17. Between Jefferson Street and Dingle Road - Keetch Road (2 miles east of the Montpelier area). The roadway is reduced to one lane. The road is being repaved. Look out for loose gravel on the roadway. Consider using an alternate route. Speed restrictions are in force. There is a width limit in effect. Speed limit 45 MPH. Width limit 12'0". From 8:00AM MDT to 8:00PM MDT on weekdays. Until July 17. Between Robinson Bar Road (14 miles north of the Stanley area) and Slate Creek Road (15 miles south of the Clayton area). Major road construction work is in progress. The roadway is reduced to one lane. Look out for loose gravel on the roadway. Expect delays. Look out for flaggers. Look out for temporary traffic lights. There is a width limit in effect. Width limit 14'0". Expect 15 - minute delays. From 7:00AM MDT to 8:00PM MDT on weekdays. Until August 7. Between Long View Road (1 mile north of the McCall area) and Woodland Road (3 miles south of the New Meadows area). Road construction work is in progress. The roadway is reduced to one lane. Look out for flaggers. Expect delays. Speed restrictions are in force. Speed limit 35 MPH. Width limit 12'0". Expect 15 - minute delays. From 7:00AM MDT to 12:00PM MDT on Fridays and from 7:00AM MDT to 7:00PM MDT on Mondays, Tuesdays, Wednesdays and Thursdays. Until October 21. Between Exit 54: US 20; Broadway Avenue and Exit 60: The Isaacs Canyon Interchange (near Boise). Road construction work is in progress. Bridge construction work is in progress. The roadway is reduced to one lane. Speed restrictions are in force. There is a width limit in effect. Speed limit 55 MPH. Width limit 16'0". Until October 1. Between Exit 52: Orchard Street and Exit 57: ID 21; Gowen Road (near Boise). Road construction work is in progress. Bridge construction work is in progress. The roadway is reduced to one lane. Speed restrictions are in force. Speed limit 55 MPH. From 8:00PM MDT to 5:00AM MDT daily. Until December 1. Between Wood Canyon Road and Geneva Cemetery Road (8 to 9 miles north of the Montpelier area). The roadway is reduced to one lane. The right lane is closed. Expect delays. Road maintenance work is in progress. A pilot car is in operation. Look out for flaggers. Reduce your speed. Expect 5 - minute delays. From 7:00AM MDT to 5:00PM MDT on Tuesday and Wednesday. Until today at about 5:00PM MDT. Between Exit 67: Mill Street and Lookout Pass (4 miles east of the Mullan area). Road construction work is in progress. The roadway is reduced to one lane. Truck restrictions are in force. There is a length limit in effect. Speed limit 45 MPH. Width limit 10'6". Until September 20, 2016. Between Antelope Flat Road (1 mile west of the Swan Valley area) and The Wyoming State Line (16 miles east of the Irwin area). There is danger of a rock fall. Between Poplar Road (5 miles east of the Ririe area) and The Wyoming State Line (16 miles east of the Irwin area). Look out for large animals on the roadway. Drive with extreme caution. Between Wyoming State Line and US 89. The roadway is reduced to one lane. The road is being repaved. Look out for loose gravel on the roadway. Consider using an alternate route. Speed restrictions are in force. There is a width limit in effect. Speed limit 45 MPH. Width limit 12'6". From 8:00AM MDT to 8:00PM MDT on weekdays. Until July 17. Between Exit 38: I-84B (Meridian) and Exit 49: I-184 (Boise). Road construction work is in progress. The roadway is reduced to three lanes. Speed restrictions are in force. Speed limit 55 MPH. Until August 15. Between East 3100 South Road and North Wendell Road (near Wendell). Major road construction work is in progress. The roadway is reduced to two lanes because the road is being repaved. Look out for flaggers. Expect delays. There is a width limit in effect. The sidewalk is closed. Expect 15 - minute delays. Width limit 12'0". Until September 25. Between Exit 211: US 30; ID 24 and Exit 222: I-86 (5 to 6 miles east of the Heyburn area). Look out for long term road construction work due to bridge construction work. The roadway is reduced to two lanes. Speed restrictions are in force. There is a width limit in effect. Drive with extreme caution. Speed limit 65 MPH. Width limit 12'0". Until June 2, 2017. Between Exit 17: ID 36; State Highway 36 (2 miles north of the Malad City area) and Exit 31: ID 40; Downey Road (11 miles south of the Arimo area). The roadway is reduced to one lane. There is work on the shoulder. From 7:00AM MDT to 5:00PM MDT on weekdays. Until September 16. Between Exit 312 and Leon Road (6 miles north of the Lewiston area). Road construction work is in progress. There is a width limit in effect. Width limit 11'0". Speed limit 45 MPH. Until September 8. Between Deer Flat Road (1 mile south of the Nampa area) and 3rd Street; 12th Avenue (Nampa). Road construction work is in progress. The roadway is reduced to one lane. Look out for flaggers. Expect delays. Speed restrictions are in force. Expect 15 - minute delays. Speed limit 45 MPH. Until September 11. Between The Inkom Port of Entry and Exit 69: Clark Street (1 mile south of the Pocatello area). The roadway is reduced to one lane. Blasting is in progress. Road construction work is in progress. Consider using an alternate route. A pilot car is in operation. Expect delays. There is a width limit in effect. Expect 5 - minute delays. Width limit 16'0". From 7:00AM MDT to 7:00PM MDT on weekdays. Until December 15. Between Main Street and Mores Creek Summit (11 miles north of the Idaho City area). Look out for loose gravel on the roadway.
US 95: Midvale Hill Summit
ID 71: Brownlee Summit
US 93: Willow Creek Summit
ID 75: Galena Summit
ID 21: Highland Valley Summit
I-90: Fourth of July Pass
US 95: White Bird Hill Summit
US 89: Geneva Summit
ID 21: Beaver Creek Summit
US 93: Nevada Line Pass
ID 38: Holbrook Summit
ID 29: Bannock Pass
US 30: Border Summit
US 93: Lost Trail Pass
I-15: Monida Pass
US 30: Fish Creek Summit
US 20: Cat Creek Summit
ID 36: Emigration Pass
I-15: Malad Summit
ID 55: Horseshoe Bend Hill Summit
ID 21: Banner Creek Summit
ID 21: Mores Creek Summit
I-84: Sweetzer Summit
ID 28: Gilmore Summit
I-90: Lookout Pass
ID 33: Teton Pass
US 20: Targee Pass
ID 31: Pine Creek Pass
ID 87: Reynolds Pass
US 95: Lewiston Hill Summit
US 30: Georgetown Summit
US 12: Lolo Pass
Google Static Map Image
Mountain Pass Mountain Pass