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 I-84 and US 20 (Boise). Look out for a slow moving maintenance vehicle. There is work on the shoulder. Until today at about 3:00PM MDT. Between Exit 44: ID 69 (Meridian) and Exit 54: US 20; Broadway Avenue (Boise). Look out for a slow moving maintenance vehicle. There is work on the shoulder. Until today at about 3:00PM MDT. Between Pine Creek Bench Road and Mike Spencer Canyon Road (3 miles east of the Swan Valley area). Bridge maintenance work is in progress. Expect delays. Expect single line traffic alternating directions. Width limit 12'0". Until October 17. Between Exit 346: Bridge Street and US Route 20 Business; 2600 East Road (1 mile east of the St. Anthony area). The intersecting road is closed because the bridge is closed. A detour is in operation. Until October 1. 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. There is work on the shoulder. People are working in the median. The roadway is reduced to one lane. Speed restrictions are in force. There is a width limit in effect. A detour is in operation. Speed limit 55 MPH. Width limit 12'0". Until October 1, 2015. Between Exit 52: Orchard Street and Exit 57: 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, 2015. Between Exit 29: US 20; Franklin Road and Exit 38: I-84B (near Nampa). Road construction work is in progress. Bridge construction work is in progress. The roadway is reduced to one lane. Speed limit 55 MPH. Until October 3. Between Eastgate Drive (Ponderay) and State Highway 200B (1 mile west of the Hope area). Road construction work is in progress. Look out for flaggers. Truck speed limit 45 MPH. Until September 11. Between Banks Valley Road and Pegram Road (6 to 11 miles east of the Montpelier area). The roadway is reduced to one lane. Road construction work is in progress. The road is being repaved. Expect delays. Look out for flaggers. Consider using an alternate route. Speed restrictions are in force. There is a width limit in effect. Truck restrictions are in force. If weather permits. Speed limit 55 MPH. Width limit 12'0". Expect 15 - minute delays. Until September 30. Between ID 55 (Meridian) and I-184 (Boise). Traffic is slow. Between Bunco Road - Brunner Road (near Athol) and Old House Road (2 miles north of the Athol area). Major road construction work is in progress. The roadway is reduced to one lane because of a new road layout. Expect changing traffic patterns. On bridges. Reduce your speed. Look out for flaggers. Until September 30. Between Jefferson Street (near Montpelier) and Dingle Road - Keetch Road (3 miles east of the Montpelier area). The roadway is reduced to one lane. Road construction work is in progress. The road is being repaved. Speed restrictions are in force. There is a width limit in effect. Look out for flaggers. Expect delays. Consider using an alternate route. If weather permits. Speed limit 55 MPH. Width limit 17'0". From 7:00AM MDT to 7:00PM MDT daily. Until September 13. Between The Oregon State Line (near Fruitland) and Exit 17: Sand Hollow (12 miles west of the Caldwell exit). Road construction work is in progress. There is work on the shoulder. The roadway is reduced to one lane. Speed restrictions are in force. There is a width limit in effect. Speed limit 65 MPH. Width limit 12'0". Until October 31. Between US 20; US 91 and Exit 128: Osgood Road (near Idaho Falls). Road construction work is in progress. The exit ramp is closed. The right lane is closed. Follow the detour signs. There is a width limit in effect. Width limit 14'0". Until September 16. Between Washington Street - Madison Street and Comance Street (Bonners Ferry). Bridge maintenance work is in progress. Look out for flaggers. The roadway is reduced to two lanes. Speed limit 25 MPH. Width limit 12'0". Until September 26. Between Main Street and Mores Creek Summit (11 miles north of the Idaho City area). Road construction work is in progress. The roadway is reduced to one lane. Look out for loose gravel on the roadway. Look out for flaggers. A pilot car is in operation. Expect delays. Speed restrictions are in force. There is a width limit in effect. Width limit 12'0". Speed limit 35 MPH. Expect 15 - minute delays. Until September 10. Between US 30 and Exit 58: Interstate 15 Business (near Inkom). The roadway is reduced to one lane. Road construction work is in progress. The road is being repaved. Look out for loose gravel on the roadway. Expect delays. A pilot car is in operation. Look out for flaggers. Consider using an alternate route. Reduce your speed. Expect 15 - minute delays. From 9:00AM MDT to 6:00PM MDT on weekdays. Until September 12. Between Exit 40: Arimo Road and US 30 (near McCammon). The roadway is reduced to one lane. Road construction work is in progress. The road is being repaved. Look out for loose gravel on the roadway. Expect delays. A pilot car is in operation. Look out for flaggers. Consider using an alternate route. Reduce your speed. Expect 15 - minute delays. From 9:00AM MDT to 6:00PM MDT on weekdays. Until September 12.
ID 38: Holbrook Summit
ID 33: Teton Pass
US 89: Geneva Summit
ID 29: Bannock Pass
I-15: Monida Pass
US 93: Lost Trail Pass
ID 36: Emigration Pass
ID 21: Beaver Creek Summit
ID 21: Mores Creek Summit
ID 87: Reynolds Pass
ID 55: Horseshoe Bend Hill Summit
ID 28: Gilmore Summit
US 30: Georgetown Summit
US 20: Targee Pass
US 95: Midvale Hill Summit
ID 21: Highland Valley Summit
US 93: Willow Creek Summit
US 30: Border Summit
US 20: Cat Creek Summit
I-90: Fourth of July Pass
ID 21: Banner Creek Summit
US 12: Lolo Pass
US 30: Fish Creek Summit
I-90: Lookout Pass
I-84: Sweetzer Summit
US 93: Nevada Line Pass
ID 31: Pine Creek Pass
US 95: White Bird Hill Summit
ID 71: Brownlee Summit
US 95: Lewiston Hill Summit
ID 75: Galena Summit
I-15: Malad Summit
Google Static Map Image
Mountain Pass Mountain Pass