List of Idaho State Highways

From Wikipedia, the free encyclopedia

The Idaho Transportation Department is responsible for the establishment and classification of a state highway network which includes the interstate highways, U.S. highways, and state routes. These routes are listed below.

1 History
2 Interstates
3 U.S. Highways
4 State highways
5 References
6 External links

[edit] History

Instead of numbering its highways, Idaho had a system of lettered Sampson Trails in the 1920s.^[1]

Please help improve this section by expanding it.
Further information might be found on the talk page or at requests for expansion.

[edit] Interstates

	Interstate 15	At 200 miles in length, it traverses through Pocatello, Blackfoot, and Idaho Falls.
	Interstate 84	Crossing through the "heel" of the Idaho "boot", this interstate passes through Boise, near Twin Falls, and other smaller towns.
	Interstate 86	Located entirely within Idaho, it stretches from Interstate 84 in Heyburn to Interstate 15 at Pocatello.
	Interstate 90	The 73-mile segment of interstate highway boasted one of the last traffic lights on the interstate highway system at Wallace.
	Interstate 184	This spur connects Interstate 84 travelers to downtown Boise.

[edit] U.S. Highways

	US-2
	US-10
	US-12
	US-20
	US-26
	US-30
	US-30N
	US-30S
	US-89
	US-91
	US-93
	US-95
	US-95E
	US-95W
	US-191
	US-195
	US-287
	US-410
	US-630

[edit] State highways

	SH-1	Connects US-95 to the Canadian border at Porthill.
	SH-3	Runs from Nez Perce County north to I-90 in Kootenai County.
	SH-4	A six-mile road from Wallace to the ghost towns of Gem and Burke.
	SH-5	A short road from Plummer to St. Maries.
	SH-6	Connects State Highway 3 to the Washington border near Potlatch.
	SH-7	Serves the communities of Orofino and Ahsahka.
	SH-8	Runs from the Washington border at Moscow to Elk River.
	SH-9	Connects State Highway 6 at Princeton to State Highway 8 at Deary.
	SH-11	A road through Weippe and Pierce in Clearwater County.
	SH-13	Runs from Kooskia to downtown Grangeville.
	SH-14	Entirely in Idaho County, it connects Grangeville to Elk City.
	SH-16	A short route from Star to Emmett.
	SH-19	A valley road from Caldwell to the Oregon border near Homedale.
	SH-21	Runs from the east end of Boise to Stanley.
	SH-22	A route from Dubois to Butte County, where it joins State Highway 33.
	SH-24	In south-central Idaho from Burley to Shoshone.
	SH-25	Runs near Interstate 84 from Jerome to the Declo area.
	SH-27	Connects the town of Oakley to Burley and Paul.
	SH-28	Runs from Salmon to Interstate 15 near the Continental Divide.
	SH-29	A route from Leadore to the nearby Montana border.
	SH-31	In eastern Idaho from Swan Valley to Victor.
	SH-32	An eastern Idaho road from Ashton to Tetonia.
	SH-33	Runs from Butte County to the Wyoming border.
	SH-34	Diverges from State Highway 36 near Preston, and runs to the Wyoming border.
	SH-36	An east-west road from Ovid through Preston to Interstate 15.
	SH-37	Connects Holbrook to Interstate 86 at American Falls.
	SH-38	Runs east from Holbrook to Malad City and Interstate 15.
	SH-39	A route from Blackfoot to American Falls.
	SH-40	A very short connector from Downey to Interstate 15.
	SH-41	Runs north from Post Falls to the Washington border (near Newport, Washington).
	SH-43	A short route from US Highway 26 north to Ucon.
	SH-44	Cuts across the Treasure Valley from Interstate 84 to Garden City.
	SH-45	Connects State Highway 78 to downtown Nampa.
	SH-46	Runs south from Camas County to Wendell.
	SH-47	A short highway in Fremont County that ends in Ashton.
	SH-48	A route in eastern Idaho from Roberts to Ririe.
	SH-50	Connects US Highway 30 near Kimberly to State Highway 25.
	SH-51	A rural road from Mountain Home south to the Nevada border.
	SH-52	Runs from Horseshoe Bend to the Oregon border at Payette.
	SH-53	Runs west from Rathdrum to the Washington border.
	SH-54	In northern Idaho between Spirit Lake and Bayview.
	SH-55	Begins at Marsing, runs east to Meridian, and turns north to New Meadows.
	SH-57	A route from Priest River to Nordman.
	SH-58	A short continuation of WA 278 to fully connect US Highway 95 to Rockford, Washington.
	SH-60	Runs from US Highway 95 near Plummer to the Washington border.
	SH-61	A one-mile continuation of WY 89 near Geneva.
	SH-62	A route from Craigmont to Nezperce in north-central Idaho.
	SH-64	Runs east from Nezperce to Kamiah and US Highway 12.
	SH-66	A one-mile road from US Highway 95, near Viola, that continues into Washington.
	SH-67	A road between Grandview and Mountain Home.
	SH-69	A short highway from Kuna to Interstate 84 in Meridian.
	SH-71	Connects Cambridge to the Oregon border near Brownlee Dam.
	SH-72	Connects New Plymouth to nearby State Highway 52.
	SH-74	Starts just south of Twin Falls and ends in the downtown area.
	SH-75	Runs from Shoshone through the Sun Valley area to Challis.
	SH-77	Connects US Highway 30 to Malta.
	SH-78	A rural highway from Marsing to Hammett.
	SH-79	A road from US Highway 93 in Twin Falls north to Jerome.
	SH-81	Runs from Malta to Burley.
	SH-87	Runs from US Highway 20 near Henrys Lake to the Montana border.
	SH-97	A route from Harrison to Interstate 90.
	SH-99	A short highway from Troy to Kendrick.
	SH-128	A road in north Lewiston that runs to the Washington border.
	SH-162	A route from Nezperce to Kamiah.
	SH-200	Pend Oreille Scenic Byway runs east from Ponderay, ID to the Montana border.