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 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. Speed limit 55 MPH. Until October 1, 2015. Between I-84 (1 mile west of the Mountain Home area) and I-84 (4 miles east of the Mountain Home area). A Flash Flood Warning is in effect. Until today at about 6:45PM MDT. 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. There is a width limit in effect. There is work on the shoulder. People are working in the median. Speed restrictions are in force. Speed limit 55 MPH. Width limit 14'0". From 8:00PM MDT to 5:00AM MDT daily. Until December 1, 2015. Between Samaria Road and Edwards Road (5 to 6 miles east of Malad City). The roadway is reduced to one lane. The road is being repaved. Look out for mobile maintenance operations. Road maintenance work is in progress. There are alternating lane closures. A pilot car is in operation. Look out for flaggers. Expect delays. Expect 15 - minute delays. From 7:00AM MDT to 6:00PM MDT on Monday, Tuesday, Wednesday and Thursday. Until August 6. 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. There is a width limit in effect. A detour is in operation. Speed restrictions are in force. Speed limit 55 MPH. Width limit 10'0". Until October 3. Between Cleveland Road (17 miles west of Grace) and Rich Road (1 mile east of the Grace area). The roadway is reduced to one lane. Road construction work is in progress. Bridge construction work is in progress. Expect delays. Look out for flaggers. Consider using an alternate route. There is a width limit in effect. Observe the signals. Truck restrictions are in force. Expect 15 - minute delays. Width limit 17'0". From 7:00AM MDT to 5:00PM MDT on weekdays. Until August 13. Between Exit 38: I-84B (Meridian) and I-184 (Boise). Road construction work is in progress. Bridge construction work is in progress. The roadway is reduced to two lanes. The left lane is closed. Speed restrictions are in force. Speed limit 55 MPH. Until October 31, 2015. Between Mountain Home AFB (1 mile west of the Mountain Home AFB area) and the end of ID 67 (900 miles east of Mountain Home). A Flash Flood Warning is in effect. Until today at about 6:45PM MDT. Between Grove Avenue and Granite-Kelso Cut-Off Road (1 mile north of the Athol area). The roadway is reduced to one lane because of major road construction work. Look out for trucks entering the roadway. Speed restrictions are in force. Speed limit 45 MPH. 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 US 30; Interstate 15 Business; Aladema Avenue and Flandro Drive (Pocatello). The roadway is reduced to one lane. Night time construction work is in progress. Road construction work is in progress. Truck restrictions are in force. There is a width limit in effect. Look out for flaggers. Consider using an alternate route. Width limit 12'0". Until August 29. Between County Road (14 miles north of the New Meadows area) and Pinehurst Road (11 miles south of the Riggins area). Road construction work is in progress. There is work on the shoulder. The roadway is reduced to one lane. Look out for flaggers. Expect delays. There is a width limit in effect. Speed restrictions are in force. Width limit 14'0". Expect 5 - minute delays. Speed limit 35 MPH. From 7:00AM MDT to 7:00PM MDT on weekdays. Until August 13. 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 2. Between US Route 26 Business (near Ririe) and Bear Creek Road (2 miles east of the Irwin area). Look out for mobile maintenance operations. Until August 6, 2015. 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 flaggers. Look out for loose gravel on the roadway. Expect delays. Speed restrictions are in force. There is a width limit in effect. Expect 10 - minute delays. Width limit 12'0". From 7:00AM MDT to 12:00PM MDT on Fridays and from 7:00AM MDT to 7:00AM MDT on Mondays, Tuesdays, Wednesdays and Thursdays. Until September 10. Between ID 55 and Exit 50: Overland Road (near Boise). Traffic is stop and go. Between I-84 and US 20 (Boise). Traffic is stop and go. 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 I-84; ID 51 (Mountain Home) and Tracy Lane (14 miles west of the Fairfield area). A Flash Flood Warning is in effect. Until today at about 6:45PM MDT. Between Indian Hill Road and the end of ID 78 (32 to 38 miles east of the Grand View area). A Flash Flood Warning is in effect. Until today at about 6:45PM MDT. Between Eastgate Drive (Ponderay) and State Highway 200B (1 mile west of the Hope area). Road construction work is in progress. The roadway is reduced to one lane. Look out for flaggers. A pilot car is in operation. Speed limit 35 MPH. Until September 11. Between Oregon Trail Road (12 miles south of the Mountain Home area) and I-84; US 20 (Mountain Home). A Flash Flood Warning is in effect. Until today at about 6:45PM MDT. 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 14'0". Until October 31. Between Star Road and Black Cat Road (1 to 2 miles east of the Star area). Road construction work is in progress. There is work on the shoulder. Speed restrictions are in force. There is a width limit in effect. Speed limit 45 MPH. Width limit 12'0". Until August 14. 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 restrictions are in force. There is a width limit in effect. A detour is in operation. Speed limit 55 MPH. Width limit 18'0". Until October 3. Between The Boise Port of Entry and Exit 74: Simco Road (8 to 12 miles east of the Boise area). Road construction work is in progress. The road is being repaved. 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 16'0". Until August 15. Between North Plummer Road and Short Road (near Star). Road construction work is in progress. Speed restrictions are in force. Speed limit 45 MPH. Expect 10 - minute delays. Until August 14. Between Exit 71: Mayfield Road (13 miles east of the Boise area) and The Bliss Rest Area - Elmore County Line (6 miles west of the Bliss area). A Flash Flood Warning is in effect. Until today at about 6:45PM MDT. Between Exit 29: US 20; Franklin Road and Exit 44: ID 69 (near Nampa). Traffic is stop and go.
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