Idaho Transportation Department Logo Idaho Transportation Department   Highway Info
Mountain Passes—Statewide
Map of Statewide Between The Oregon State Line and Rock Spur Road (23 to 33 miles south of the Homedale area). Look out for large animals on the roadway. Drive with extreme caution. 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. There is a width limit in effect. Speed restrictions are in force. Expect delays. Speed limit 35 MPH. Expect 15 - minute delays. Width limit 12'0". 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 15'0". 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. Look out for loose gravel on the roadway. Speed restrictions are in force. Speed limit 55 MPH. From 8:00PM MDT to 5:00AM MDT daily. Until December 1. 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 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 September 30. Between Exit 339: 4000 North Road (near Sugar City) and The South Ashton City Limits (6 miles west of the Ashton area). Look out for mobile maintenance operations. There is work on the shoulder. Until September 10. Between Bridge Street and Wooton Way (near Blackfoot). Road construction work is in progress. Until September 30. 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 Smokey Boulder Road (10 miles north of the New Meadows area) and Pinehurst Road (13 miles south of the Riggins area). There is work on the shoulder because of a forest fire. Speed restrictions are in force. Speed limit 45 MPH. 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 Greer Grade Road (2 miles west of the Kamiah area) and No Kid Lane (near Kamiah). Look out for a forest fire. Drive carefully. 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. Road construction work is in progress. Expect delays. A detour is in operation. Follow the detour signs. Speed restrictions are in force. There is a width limit in effect. Expect 15 - minute delays. Speed limit 65 MPH. Width limit 12'0". From 12:00AM MDT to 12:00AM MDT daily. Until September 16. 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. Expect 15 - minute delays. From 9:00AM MDT to 4:00PM MDT on weekdays. 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 Fourth Street and I-184 (Boise). The road is closed intermittently. Look out for flaggers. Consider using an alternate route. Between First Avenue (Deary) and ID 8; The Junction of Highway 3 and Highway 8 in Bovill (Bovill). Road construction work is in progress. The roadway is reduced to one lane. A pilot car is in operation. Look out for flaggers. There is a width limit in effect. Expect delays. Width limit 12'0". Expect 15 - minute delays. Until September 25.
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