List of U.S. Highways in Idaho

The U.S. Highways in Idaho are the segments of the United States Numbered Highway System owned and maintained by the Idaho Transportation Department (ITD) in the U.S. state of Idaho.

U.S. Highways of the Idaho State Highway System
Highway markers for U.S. Highways 2, 95, and 195
System information
Maintained by ITD
Highway names
InterstatesInterstate n (I-n)
US HighwaysU.S. Highway n (US-n)
StateIdaho State Highway n (SH-n)
System links
  • State Highways in Idaho

Mainline highways
Number Length (mi)[1] Length (km) Southern or western terminus Northern or eastern terminus Formed Removed Notes
US-2 80.152128.992 US 2 / SH-41 in OldtownUS 2 near Moyie Springs 01926-01-011926current
US-10 —— US 10 in State LineUS 10 at Lookout Pass 01926-01-01192601977-01-011977 Replaced by I-90
US-12 174.210280.364 US 12 in LewistonUS 12 at Lolo Pass 01962-01-011962current
US-20 348.850561.420 US 20 / US 26 near ParmaUS 20 near West Yellowstone, MT 01940-01-011940current
US-26 402.500647.761 US 20 / US 26 near ParmaUS 26 near Alpine, WY 01952-01-011952current
US-30 455.481733.026 US 30 near FruitlandUS 30 near Montpelier 01926-01-011926current
US 30N —— —— ——
US 30N —— —— ——
US-30S —— —— ——
US-89 44.2471.20 US 89 near Fish HavenUS 89 near Geneva 01939-01-011939current
US-91 122.866197.734 US 91 near PrestonUS 26 in Idaho Falls 01926-01-011926current
US-93 350.819564.588 US 93 near Jackpot, NVUS 93 at Lost Trail Pass 01926-01-011926current
US-95 538.562866.732 US 95 near HomedaleBC 95 near Eastport 01926-01-011926current
US-95E —— —— ——
US-95W —— —— ——
US-191 —— US 191 near Malad CityUS 191 at Targhee Pass 01926-01-01192601978-01-011978 Replaced by I-15
US-195 0.5770.929 US 95 near LewistonUS 195 near Lewiston 01979-01-011979current
US-287 —— US 287 at Raynolds PassUS 287 at Targhee Pass —— Replaced by SH-87
US-410 —— US 410 in LewistonUS 95 in Lewiston 01926-01-01192601967-01-011967 Replaced by US-12
US 630 —— US 630 near WeiserUS 95 in Weiser 01928-01-01192801931-01-011931 Replaced by US-95 Spur
  •       Former

Special routes
Number Length (mi)[1] Length (km) Southern or western terminus Northern or eastern terminus Formed Removed Notes

US-10 Alt.		 —— —— ——

US-10 Bus.		 —— —— ——

US-20 Bus.		 3.6405.858 —— —— Serves Idaho Falls

US-20 Bus.		 1.6842.710 —— —— Serves Rigby

US-20 Bus.		 2.8794.633 —— —— Serves St. Anthony

US-20 Spur		 —— —— —— Serves Boise

US-26 Bus.		 2.9814.797 —— —— Serves Ririe

US-30 Bus.		 —— —— —— Serves Pocatello

US-30 Bus.		 10.27016.528 —— —— Serves Lava Hot Springs

US-91 Bus.		 —— —— —— Serves McCammon

US-91 Bus.		 —— —— —— Serves Inkom

US-93 Alt.		 —— —— ——

US-93 Bus.		 8.11013.052 —— —— Serves Twin Falls

US-93 Spur		 0.911.46 —— —— Serves Twin Falls

US-93 Spur		 0.3910.629 —— —— Serves Challis

US-95 Bus.		 1.4202.285 —— —— Serves Cottonwood

US-95 Bus.		 1.7572.828 —— —— Serves Craigmont

US-95 Bus.		 4.0216.471 —— —— Serves Winchester

US-95 Bus.		 —— —— —— Serves Bonners Ferry

US-95 Spur		 —— —— —— Serves Payette

US-95 Spur		 2.3323.753 —— —— Serves Weiser

US-95 Spur		 0.5520.888 —— —— Connects to US 195
  •       Former

See also

References
  1. "Milepoint Logs". Idaho Transportation Department. Retrieved February 15, 2017.
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