Idaho Transportation Department Logo Idaho Transportation Department   Highway Info
This website will transition to a NEW 511 site. Start using it NOW!
Mountain Passes—Central Idaho
Map of Central Idaho Between Exit 54: Broadway Avenue and Exit 57: Gowen Road (Boise). Road construction work is in progress. A seal coat treatment has been applied. The right lane is closed. Speed limit 55 MPH. Width limit 12'0". Until today at about 11:59PM MDT. Between Exit 114 (5 miles west of the Glenns Ferry area) and Exit 121 (near Glenns Ferry). The road is being reconstructed. Eastbound traffic. The right lane is closed. Westbound traffic. The left lane is closed. Width limit 14'0". Speed limit 65 MPH. Until August 21, 2021 at about 11:59PM MDT. Between Baker Creek Road and Spring Creek Road; Owl Creek Road (12 to 17 miles north of the Ketchum area). Road maintenance work is in progress. The road is being repaved. The roadway is reduced to one lane. Reduce your speed. Look out for flaggers. A pilot car is in operation. Traffic is being held. Expect delays. Expect 20 - minute delays. Until Thursday, at about 8:00PM MDT. Between Thompson Creek Road (3 miles south of the Clayton area) and US 93 (20 miles north of the Clayton area). Look out for large animals on the roadway. Prepare to stop. Between Smith's Ferry Drive - High Valley Road and Round Valley Road (13 miles south of the Cascade area). Major road construction work is in progress. Until July 30, 2021 at about 11:59PM MDT. Between McKim Creek Road (25 miles north of the Challis area) and Rattlesnake Creek Road (17 miles south of the Salmon area). Road maintenance work is in progress. Road construction work is in progress. Until June 30, 2021 at about 5:00PM MDT. Between Middle Fork Road and Dartmouth Street (2 miles south of the Council area). Road maintenance work is in progress. Until tomorrow at about 5:00PM MDT. Between 8th North Street and North Main Street (Mountain Home). Road construction work is in progress. The roadway is reduced to one lane. Width limit 11'0". From 12:00AM MDT to 12:00PM MDT daily. Until September 3, 2021 at about 12:00PM MDT. Between Johnson Road and McKim Creek Road (19 miles north of the Challis area). There is danger of a rock fall. Drive with extreme caution. Between Johnson Road and McKim Creek Road (19 miles north of the Challis area). There is danger of a rock fall. Drive with extreme caution. Between Johnson Road and McKim Creek Road (19 miles north of the Challis area). There is danger of a rock fall. Drive with extreme caution. Between Redfish Lake Road (Stanley) and US 93 (20 miles north of the Clayton area). There is danger of a rock fall. Drive with extreme caution. Between ID 78 and Locust Lane (14 miles south of the Nampa area). The road is rough. Between ID 78 and Lakeshore Drive (1 to 14 miles south of the Nampa area). There is work on the shoulder. From 6:00AM MDT to 5:00PM MDT on weekdays. Until August 15, 2021 at about 5:00PM MDT. Between Myrtle Street (Grangeville) and Main Road (4 miles north of the Grangeville area). Road construction work is in progress. The road is being repaved. The roadway is reduced to one lane. Expect delays. A pilot car is in operation. Look out for flaggers. Speed restrictions are in force. There is a width limit in effect. Expect 15 - minute delays. Width limit 12'0". Speed limit 30 MPH. Until August 6, 2021 at about 6:00PM PDT. Between US 26 (Shoshone) and Marley Road (4 miles south of the Richfield area). Road construction work is in progress. The road is being repaved. A seal coat treatment has been applied. Look out for loose gravel on the roadway. The roadway is reduced to one lane. A pilot car is in operation. Look out for flaggers. Expect delays. Speed restrictions are in force. There is a width limit in effect. Expect 10 - minute delays. Speed limit 35 MPH. Width limit 12'6". From 7:00AM MDT to 5:00PM MDT on weekdays. Until August 23, 2021 at about 5:00PM MDT. Between Exit 28: 10th Street (Caldwell) and Exit 33 (near Nampa). Road construction work is in progress. The right shoulder is closed. The road is being repaved. Reduce your speed. There is a width limit in effect. The roadway is reduced to one lane. Speed limit 55 MPH. Width limit 16'0". Until July 1, 2021 at about 6:00AM MDT. Between Small Cut-Off Road and Medicine Lodge Road (5 to 8 miles west of the Dubois area). The pavement has buckled. Drive with extreme caution. Between US 93 (Arco) and Argon National Engineering Lab Road (28 miles west of the Idaho Falls area). Look out for large animals on the roadway. Between North Linder Road and North Locust Grove Road (near Eagle). Road construction work is in progress. There is work on the shoulder. The roadway is reduced to one lane. The right lane is closed. Expect delays. Speed limit 45 MPH. Expect 15 - minute delays. Until July 5, 2021 at about 11:59PM MDT. Between Cloverdale Road - Joplin Road and Joplin Road; Mountain View Drive (Boise). Road construction work is in progress. The right lane is closed. Drive carefully. From 7:00AM MDT to 7:00PM MDT daily. Until July 27, 2021 at about 7:00PM MDT. Between US Route 95 Business (5 miles north of the Craigmont area) and Winchester-Culdesac Road (7 miles south of the Culdesac area). There is work on the shoulder. The roadway is reduced to two lanes. Expect delays. Look out for flaggers. Expect 5 - minute delays. Until Friday, at about 5:30PM PDT. Between US 20 and The Butte - Jefferson County Line (10 to 43 miles west of the Mud Lake area). Look out for large animals on the roadway. Between Lava Lake Road (16 miles north of the Carey area) and US 20 (Arco). Look out for large animals on the roadway. Between McGowan Creek Road (13 miles south of the Challis area) and McKim Creek Road (20 miles north of the Challis area). Look out for large animals on the roadway. Between McGowan Creek Road (13 miles south of the Challis area) and McKim Creek Road (20 miles north of the Challis area). Look out for large animals on the roadway. Between McGowan Creek Road (13 miles south of the Challis area) and McKim Creek Road (20 miles north of the Challis area). Look out for large animals on the roadway. Between State Street and Riverside Drive (Eagle). Road construction work is in progress. The roadway is reduced to one lane. From 10:00PM MDT to 6:00AM MDT on weekends and from 10:00PM MDT to 5:00AM MDT on weekdays. Until September 20, 2021 at about 5:00AM MDT. Between ID 28 and Bannock Pass (13 miles north of the Leadore area). Road maintenance work is in progress. Until June 30, 2021 at about 5:00PM MDT. Between Oak Street (Shelley) and Heyrend Way (near Idaho Falls). Road construction work is in progress. There is work on the shoulder. The road is being repaved. Speed restrictions are in force. Consider using an alternate route. Speed limit 45 MPH. Until August 13, 2021 at about 6:00PM MDT. Between US 20 and Eight Mile Canyon Road (39 to 43 miles west of the Mud Lake area). Look out for a herd of animals on the roadway. Between Exit 33 and Exit 38: I-84B Nampa; Garrity Blvd (near Nampa). Look out for construction work. There is work on the shoulder. The right lane is closed. The left lane is closed. Bridge maintenance work is in progress. Until August 15, 2021 at about 6:00AM MDT. Between Old Highway 91 and 2000 South Road; Menan Butte Road (13 to 15 miles west of the Rexburg area). Be aware of the animal crossing area. Drive with extreme caution. Between Maires Lane - D-C Bar Road and Hayden Creek Lane (12 to 17 miles north of the Leadore area). Road construction work is in progress. Until July 31, 2021 at about 6:00PM MDT. Between US 95B Craigmont (near Craigmont) and Frontage Road (near Culdesac). Road construction work is in progress. There is work on the shoulder. The roadway is reduced to one lane. Expect delays. Look out for flaggers. Expect 10 - minute delays. Until October 19, 2021 at about 5:30PM PDT. Between ID 21 (Stanley) and Squaw Creek Road (5 miles south of the Clayton area). Look out for large animals on the roadway. Between North Linder Road and North Meridian Road (near Eagle). Road construction work is in progress. There are alternating lane closures. There is work on the shoulder. Consider using an alternate route. Speed restrictions are in force. Speed limit 45 MPH. Until October 1, 2021 at about 6:00PM MDT. Between US 93 (Arco) and New Sweden School Road (near Idaho Falls). Look out for mobile maintenance operations. Look out for flaggers. A pilot car is in operation. Drive with extreme caution. Prepare to stop. Between ID 55 (Eagle) and US 20; Glenwood Street (Garden City). Look out for rush hour traffic. Between US 20 (Arco) and Hammond Lane (near Challis). Look out for large animals on the roadway. Between Eleventh Avenue North Extension (5 miles east of the Caldwell area) and North Fox Run Avenue (near Eagle). Look out for rush hour traffic. Between I-84 and the end of I-184 (Boise). Look out for rush hour traffic. Between Cloverdale Road - Joplin Road and Eighth Street (Boise). Look out for rush hour traffic. Between I-84 (Meridian) and US 20 (Boise). Look out for rush hour traffic. Between Exit 28: 10th Street (Caldwell) and Exit 35: Northside Boulevard (Nampa). Look out for rush hour traffic. Between Exit 36 (Nampa) and Exit 44 (near Meridian). Look out for rush hour traffic.
ID 75: Galena
US 12: Lolo Pass
ID 29: Bannock Pass
ID 21: Highland Valley
ID 55: Horseshoe Bend Hill
US 93: Willow Creek
US 95: White Bird Hill
US 20: Cat Creek
ID 28: Gilmore
ID 21: Mores Creek
US 95: Midvale Hill
I-15: Monida Pass
ID 21: Banner Creek
US 95: Lewiston Hill
ID 71: Brownlee
ID 21: Beaver Creek
US 93: Lost Trail Pass
Google Static Map Image
Mountain Pass Mountain Pass