Idaho Roads - Idaho Highways Map

Find Idaho Interstates and Federal Highways


Map of Idaho Cities and Idaho Road Map

History of Interstates and U.S. Highways in Idaho

Idaho’s Interstate and U.S. Highway system is essential for connecting the state’s agricultural regions, cities, and remote wilderness areas. Idaho’s first major highways were constructed in the early 20th century, with U.S. routes such as U.S. 20 and U.S. 95 forming the backbone of the state’s early road network. The construction of the Interstate Highway System in the 1950s brought Interstates like I-84 and I-90, which play key roles in connecting Idaho with neighboring states and national transportation corridors.

Idaho’s highways are critical for both passenger travel and commerce, with major highways like I-84 serving as important freight routes for agricultural products, mining goods, and timber. I-84, which runs through southern Idaho, is one of the busiest highways in the state, carrying tens of thousands of vehicles per day, particularly near Boise. Idaho’s highways also play an important role in tourism, providing access to popular destinations like Yellowstone National Park and the Sawtooth Mountains.

Idaho continues to invest in its highway infrastructure, with ongoing projects aimed at expanding key corridors and improving safety. Major projects include the widening of I-84 near Boise, upgrades to U.S. 95 in northern Idaho, and improvements to I-90. These efforts are designed to accommodate the state’s growing population and economy, as well as to enhance connectivity across the region.

Busiest and Longest Federal Interstates and U.S. Highways in Idaho

Interstate or Highway Length (mi) Length (km) Southern or Western Terminus Northern or Eastern Terminus Created
I-84 276 444 Oregon Border Utah Border 1956
I-90 74 119 Washington Border Montana Border 1956
I-86 63 101 I-84 Junction (near Burley) I-15 Junction (near Pocatello) 1959
U.S. 20 393 632 Oregon Border Montana Border 1926
U.S. 95 538 866 Nevada Border Canada Border 1926
U.S. 30 453 729 Oregon Border Wyoming Border 1926
U.S. 2 81 130 Washington Border Montana Border 1926
I-15 196 315 Utah Border Montana Border 1956
U.S. 12 174 280 Montana Border Washington Border 1926
U.S. 93 350 563 Nevada Border Montana Border 1926

Idaho Designated Highways



Idaho Interstate Highway 15, Center St
Idaho Interstate Highway 15, E Alameda Rd
Idaho Interstate Highway 15, E Arimo Rd
Idaho Interstate Highway 15, I-15 Bus
Idaho Interstate Highway 15, I-15 N
Idaho Interstate Highway 15, I-15 S
Idaho Interstate Highway 15, N 4th Ave
Idaho Interstate Highway 15, N 5th Ave
Idaho Interstate Highway 15, N Old Hwy 91
Idaho Interstate Highway 15, Pocatello Ave
Idaho Interstate Highway 15, Pocatello Creek Rd
Idaho Interstate Highway 15, S 4th Ave
Idaho Interstate Highway 15, S 5th Ave
Idaho Interstate Highway 15, S Old Highway 91
Idaho Interstate Highway 15, State St
Idaho Interstate Highway 15, W Alameda Rd
Idaho Interstate Highway 15, W Broadway St
Idaho Interstate Highway 15, Yellowstone Ave
Idaho Interstate Highway 84, 2nd St S
Idaho Interstate Highway 84, 3rd St S
Idaho Interstate Highway 84, 11th Ave N
Idaho Interstate Highway 84, 11th Ave S
Idaho Interstate Highway 84, Blaine St
Idaho Interstate Highway 84, Caldwell Blvd
Idaho Interstate Highway 84, Centennial Way
Idaho Interstate Highway 84, Cleveland Blvd
Idaho Interstate Highway 84, Garrity Blvd
Idaho Interstate Highway 84, I-84 E
Idaho Interstate Highway 84, I-84 W
Idaho Interstate Highway 86, Fort Hall Ave
Idaho Interstate Highway 86, Harrison St
Idaho Interstate Highway 86, I-86 Bus
Idaho Interstate Highway 86, I-86 E
Idaho Interstate Highway 86, I-86 W
Idaho Interstate Highway 86, Lincoln St
Idaho Interstate Highway 86, Pocatello Ave
Idaho Interstate Highway 86, Rockland Hwy
Idaho Interstate Highway 86, S Frontage Rd
Idaho Interstate Highway 90, Atlas Rd
Idaho Interstate Highway 90, E Mullan Ave
Idaho Interstate Highway 90, E Seltice Way
Idaho Interstate Highway 90, E Sherman Ave
Idaho Interstate Highway 90, I-90 E
Idaho Interstate Highway 90, I-90 W
Idaho Interstate Highway 90, Markwell Ave
Idaho Interstate Highway 90, N 3rd St
Idaho Interstate Highway 90, N Ramsey Rd
Idaho Interstate Highway 90, N Spokane St
Idaho Interstate Highway 90, NFD 271 Rd
Idaho Interstate Highway 90, Northwest Blvd
Idaho Interstate Highway 90, River St
Idaho Interstate Highway 90, Silver Valley Rd
Idaho Interstate Highway 90, W Cameron Ave
Idaho Interstate Highway 184, I-184 E
Idaho Interstate Highway 184, I-184 W
Idaho US Highway 2, E Albeni Hwy
Idaho US Highway 2, Main St
Idaho US Highway 2, N 5th Ave
Idaho US Highway 2, Pine St
Idaho US Highway 2, S Main St
Idaho US Highway 2, US-2
Idaho US Highway 12, 1st St
Idaho US Highway 12, 3rd St
Idaho US Highway 12, Arrow Brg
Idaho US Highway 12, D St
Idaho US Highway 12, Hewett Rd
Idaho US Highway 12, Lolo Creek Rd
Idaho US Highway 12, Main St
Idaho US Highway 12, N And South Hwy
Idaho US Highway 12, US-12
Idaho US Highway 20, Chinden Blvd
Idaho US Highway 20, E Chinden Blvd
Idaho US Highway 20, E Front St
Idaho US Highway 20, E Grove Ave
Idaho US Highway 20, E Main St
Idaho US Highway 20, E Myrtle St
Idaho US Highway 20, Elgin Ave
Idaho US Highway 20, Farnsworth Way
Idaho US Highway 20, Franklin Rd
Idaho US Highway 20, Grandview Dr
Idaho US Highway 20, N 5th E
Idaho US Highway 20, N Holmes Ave
Idaho US Highway 20, N Main St
Idaho US Highway 20, Rigby Hwy N
Idaho US Highway 20, Rigby Hwy S
Idaho US Highway 20, S Bridge St
Idaho US Highway 20, S Broadway Ave
Idaho US Highway 20, S Front St
Idaho US Highway 20, S State St
Idaho US Highway 20, US-20
Idaho US Highway 20, US-20 Bus
Idaho US Highway 20, US-20 E
Idaho US Highway 20, US-20 W
Idaho US Highway 20, W Arco Hwy
Idaho US Highway 20, W Broadway St
Idaho US Highway 20, W Chinden Blvd
Idaho US Highway 20, W Front St
Idaho US Highway 20, W Grand Ave
Idaho US Highway 20, W Grove Ave
Idaho US Highway 20, W Myrtle St
Idaho US Highway 20, Yellowstone Hwy
Idaho US Highway 20, Yellowstone Hwy N
Idaho US Highway 20, Yellowstone Hwy S
Idaho US Highway 26, E Nez Perce St
Idaho US Highway 26, E Ririe Hwy
Idaho US Highway 26, N Yellowstone Hwy
Idaho US Highway 26, Northgate Mile
Idaho US Highway 26, S Greenwood St
Idaho US Highway 26, S Main St
Idaho US Highway 26, S Rail St W
Idaho US Highway 26, S Yellowstone Hwy
Idaho US Highway 26, Sage St
Idaho US Highway 26, Swan Valley Hwy
Idaho US Highway 26, University Dr
Idaho US Highway 26, US-26
Idaho US Highway 26, US-26 E
Idaho US Highway 26, US-26 W
Idaho US Highway 26, W 65th S
Idaho US Highway 26, W Nez Perce Ave
Idaho US Highway 26, W Nez Perce St
Idaho US Highway 26, Yellowstone Ave
Idaho US Highway 30, 2nd Ave E
Idaho US Highway 30, 2nd Ave N


Idaho US Highway 30, 2nd Ave S
Idaho US Highway 30, 2nd Ave W
Idaho US Highway 30, Addison Ave
Idaho US Highway 30, Addison Ave W
Idaho US Highway 30, Bennett Rd
Idaho US Highway 30, Blue Lakes Blvd
Idaho US Highway 30, Broadway Ave N
Idaho US Highway 30, Broadway Ave S
Idaho US Highway 30, E 2nd S
Idaho US Highway 30, E 3800 N
Idaho US Highway 30, E 3900 N
Idaho US Highway 30, E Benton St
Idaho US Highway 30, E Gould St
Idaho US Highway 30, E Main St
Idaho US Highway 30, Hawthorne Rd
Idaho US Highway 30, Kimberly Rd
Idaho US Highway 30, Main St
Idaho US Highway 30, Main St N
Idaho US Highway 30, N 2nd E
Idaho US Highway 30, N 4th St
Idaho US Highway 30, N Arthur Ave
Idaho US Highway 30, N Main St
Idaho US Highway 30, N Plymouth Ave
Idaho US Highway 30, N State St
Idaho US Highway 30, N Whitley Dr
Idaho US Highway 30, NW 16th St
Idaho US Highway 30, S 3rd W
Idaho US Highway 30, S 4th St
Idaho US Highway 30, S 1000 E
Idaho US Highway 30, S Arthur Ave
Idaho US Highway 30, S Main St
Idaho US Highway 30, S Pennsylvania Ave
Idaho US Highway 30, S State St
Idaho US Highway 30, S Whitley Dr
Idaho US Highway 30, Sage St
Idaho US Highway 30, SE Avenue
Idaho US Highway 30, Sunset Strip
Idaho US Highway 30, US-30
Idaho US Highway 30, US-30 Bus
Idaho US Highway 30, US-30 E
Idaho US Highway 30, W 2nd S
Idaho US Highway 30, W 400 S
Idaho US Highway 30, W Benton St
Idaho US Highway 30, W Idaho St
Idaho US Highway 30, W Main St
Idaho US Highway 30, Washington St
Idaho US Highway 89, Clay St
Idaho US Highway 89, N Main St
Idaho US Highway 89, S Main St
Idaho US Highway 89, US-89
Idaho US Highway 89, Washington St
Idaho US Highway 91, N State St
Idaho US Highway 91, N Yellowstone Hwy
Idaho US Highway 91, NW Main St
Idaho US Highway 91, S Broadway St
Idaho US Highway 91, S State St
Idaho US Highway 91, S Yellowstone Hwy
Idaho US Highway 91, SW Main St
Idaho US Highway 91, US-91
Idaho US Highway 91, W Old Highway 91
Idaho US Highway 91, W Quinn Rd
Idaho US Highway 91, Yellowstone Ave
Idaho US Highway 93, Addison Ave
Idaho US Highway 93, Addison Ave W
Idaho US Highway 93, Blue Lakes Blvd N
Idaho US Highway 93, Custer St
Idaho US Highway 93, Main St
Idaho US Highway 93, N 2400 E
Idaho US Highway 93, N Front St
Idaho US Highway 93, S Challis St
Idaho US Highway 93, S Greenwood St
Idaho US Highway 93, US-93
Idaho US Highway 95, 3rd Ave N
Idaho US Highway 95, 5th St
Idaho US Highway 95, 7th Ave N
Idaho US Highway 95, Cedar St
Idaho US Highway 95, Clark St
Idaho US Highway 95, E 7th St
Idaho US Highway 95, E Central Blvd
Idaho US Highway 95, E Main St
Idaho US Highway 95, E Superior St
Idaho US Highway 95, Foster Ave
Idaho US Highway 95, Illinois Ave
Idaho US Highway 95, Jackson St
Idaho US Highway 95, Joseph Ave
Idaho US Highway 95, King St
Idaho US Highway 95, Lincoln Way
Idaho US Highway 95, Main St
Idaho US Highway 95, Marx St
Idaho US Highway 95, Michigan St
Idaho US Highway 95, N 1st Ave
Idaho US Highway 95, N 5th St
Idaho US Highway 95, N 9th St
Idaho US Highway 95, N 16th St
Idaho US Highway 95, N And South Hwy
Idaho US Highway 95, N Dartmouth St
Idaho US Highway 95, N Jackson St
Idaho US Highway 95, N Main St
Idaho US Highway 95, N Norris Ave
Idaho US Highway 95, N Railroad St
Idaho US Highway 95, N Superior St
Idaho US Highway 95, N Washington St
Idaho US Highway 95, N Whitley Dr
Idaho US Highway 95, S 1st Ave
Idaho US Highway 95, S 16th St
Idaho US Highway 95, S Jackson St
Idaho US Highway 95, S Main St
Idaho US Highway 95, S Railroad St
Idaho US Highway 95, S Superior St
Idaho US Highway 95, S Washington St
Idaho US Highway 95, Troy Rd
Idaho US Highway 95, US-95
Idaho US Highway 95, US-95 Bus
Idaho US Highway 95, US-95 Spur
Idaho US Highway 95, Virginia St
Idaho US Highway 95, W 7th St
Idaho US Highway 95, W C St
Idaho US Highway 95, W F St
Idaho US Highway 95, W Idaho St
Idaho US Highway 95, W Main St
Idaho US Highway 95, W Walnut Ave
Idaho US Highway 195, US-195