Idaho Road Map

Written and Fact-checked by | Updated On: April 03, 2026 | 15:15 ET

Idaho Road Map showing the state routes, US highways, interstate highways, major roads, local connecting Road, secondary Road, important local road of the Idaho.

Idaho Roads and Highways Map

Idaho Road Map Showing Highways About Map: Map showing major roads, local connecting Road, secondary Road, Important Local Road of the Idaho, United States.

PDF Map - Idaho Road & Highways Map

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Roads and Highways in Idaho

Idaho has a well-connected road network that supports travel across its mountains, valleys, and agricultural regions. Major interstate highways such as I-84, I-90, and I-15 serve as key corridors linking cities like Boise, Twin Falls, Idaho Falls, and Coeur d’Alene. U.S. and state highways extend into rural and remote areas, providing access to national parks, forests, and small communities. These roads are essential for freight transport, tourism, and daily travel, ensuring reliable connectivity across Idaho’s diverse landscape.

Major Highways in Idaho

HighwayTypeRoute DirectionConnects
I-84InterstateNorthwest–SoutheastBoise, Twin Falls
I-90InterstateEast–WestCoeur d’Alene, Kellogg
I-15InterstateNorth–SouthPocatello, Idaho Falls
I-86InterstateEast–WestBurley, Pocatello
I-184InterstateEast–WestBoise connector
US 20U.S. HighwayEast–WestBoise, Idaho Falls
US 26U.S. HighwayEast–WestBoise, Rexburg
US 30U.S. HighwayEast–WestSouthern Idaho
US 95U.S. HighwayNorth–SouthBoise, Coeur d’Alene
ID 55State HighwayNorth–SouthBoise, McCall
ID 75State HighwayNorth–SouthTwin Falls, Sun Valley
ID 21State HighwayNorth–SouthBoise, Stanley
ID 44State HighwayEast–WestBoise, Middleton

Interstate Highways in Idaho

InterstateRoute DirectionKey Cities Connected
I-15North–SouthPocatello, Idaho Falls
I-84Northwest–SoutheastBoise, Twin Falls
I-86East–WestBurley, Pocatello
I-90East–WestCoeur d’Alene, Kellogg
I-184East–WestBoise

Road Network in Idaho

Idaho’s road network includes interstate highways for long-distance travel, U.S. highways connecting major regions, and state highways serving smaller towns and scenic areas. Local and rural roads provide access to farms, forests, and remote communities, supporting both everyday travel and economic activity.

Road TypeDescriptionApprox. Length
Interstate HighwaysHigh-speed corridors950 miles
U.S. HighwaysRegional connectors3,100 miles
State HighwaysStatewide routes5,000 miles
Local RoadsCity streets40,000+ miles
Rural RoadsRemote access35,000+ miles

Idaho Roads & Highways Facts

StateIdaho
Total Road Network85,000+ miles
Interstate Mileage950 miles
State Highway System5,000 miles
Total Lane Miles120,000+ miles
Major Interstate RoutesI-15, I-84, I-86, I-90
Key AuthorityIdaho Transportation Department
Number of Interstates5
Major UsesFreight, tourism
Urban Road NetworkLimited metro grids
Longest InterstateI-84
Longest U.S. HighwayUS 95

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