List of state highways in Idaho
State highways

List of state highways in Idaho

Section Title: State highways
Table Section Text: None

Number	Length (mi)	Length (km)	Southern or western terminus	Northern or eastern terminus	Formed	Removed	Notes

SH 1	12.279	19.761	US-95 near Copeland	BC 21 at Porthill	1932	current

SH 3	117.680	189.388	US-12 near Spalding	I-90 near Rose Lake	—	—

SH 4	7.380	11.877	I-90 in Wallace	National Forest Road No. 7623 at Burke	1926	current

SH 5	19.140	30.803	US-95 in Plummer	SH-3 in Saint Maries	—	—

SH 6	40.645	65.412	WA 272 near Potlatch	SH-3 near Santa	—	—

SH 7	16.563	26.656	Russell Ridge Road near Orofino	Old Highway 7 in Ahsahka	1919	current

SH 8	53.589	86.243	WA 270 in Moscow	1st Street in Elk River	—	—

SH 9	13.522	21.762	SH-8 near Deary	SH-6 near Harvard	—	—

SH 11	42.481	68.367	US-12 in Greer	Forest Service Road No. 247 near Headquarters	—	—

SH 13	26.390	42.471	US-95 in Grangeville	US-12 near Kooskia	1919	current

SH 14	49.515	79.687	SH-13 near Harpster	Airport Road in Elk City	—	—

SH 16	16.005	25.758	US-26 near Star	SH-52 in Emmett	—	—

SH 19	19.915	32.050	OR 201 near Homedale	I-84 Business in Caldwell	—	—

SH 21	130.869	210.613	I-84 in Boise	SH-75 in Stanley	—	—

SH 22	43.936	70.708	SH-33 near Howe	I-15 in Dubois	—	—

SH 24	67.533	108.684	I-84 / US-30 in Heyburn	US-93 in Shoshone	—	—

SH 25	58.048	93.419	I-84 near Jerome	I-84 / SH-77 near Declo	—	—

SH 27	26.561	42.746	Main Street in Oakley	SH-25 in Paul	—	—

SH 28	135.645	218.299	SH-33 near Mud Lake	US-93 in Salmon	1916	current

SH 29	13.614	21.910	SH-28 in Leadore	MT S-324 at Bannock Pass	—	—

SH 31	21.025	33.836	US-26 in Swan Valley	SH-33 in Victor	—	—

SH 32	28.386	45.683	SH-33 near Tetonia	SH-47 near Ashton	—	—

SH 33	155.084	249.584	US-20 / US-26 near Arco	WYO 22 near Victor	—	—

SH 34	105.980	170.558	US-91 / SH-36 in Preston	WYO 239 near Freedom	1919	current

SH 36	73.313	117.986	I-15 near Malad City	US-89 in Ovid	—	—

SH 37	31.231	50.261	Onedia–Power county line near Holbrook	I-86 near American Falls	—	—

SH 38	23.438	37.720	North Holbrook Road near Holbrook	I-15 in Malad City	—	—

SH 39	52.924	85.173	I-86 in American Falls	US-26 in Blackfoot	—	—

SH 40	2.737	4.405	I-15 near Downey	US-91 in Downey	1922	current

SH 41	39.058	62.858	I-90 in Post Falls	US-2 in Oldtown	1931	current

SH 43	3.868	6.225	US-26 at Beachs Corner	US-20 in Ucon	—	—

SH 44	23.089	37.158	I-84 near Caldwell	US-20 / US-26	—	—

SH 45	17.985	28.944	SH-78 at Walters Ferry	I-84 Business in Nampa	—	—

SH 46	43.052	69.285	I-84 near Wendell	US-20 near Fairfield	—	—

SH 47	12.420	19.988	US-20 in Ashton	Caribou-Targhee National Forest near Warm River	1932	current

SH 48	24.409	39.282	I-15 near Roberts	US-26 Business in Ririe	1930	current

SH 50	8.092	13.023	US-30 near Kimberly	SH-25 near Eden	—	—

SH 51	93.598	150.631	NV 225 near Owyhee, NV	I-84 Business in Mountain Home	1932	current

SH 52	54.126	87.107	OR 52 in Payette	SH-55 in Horseshoe Bend	—	—

SH 53	14.255	22.941	WA 290 near State Line	US-9 near Hayden	—	—

SH 54	15.440	24.848	SH-41 in Spirit Lake	Main Avenue in Bayview	—	—

SH 55	156.047	251.133	US-95 near Marsing	US-95 in New Meadows	—	—

SH 57	37.230	59.916	US-2 in Priest River	Reeder Creek Road in Nordman	—	—

SH 58	2.943	4.736	WA 278 near Rockford, WA	US-95 near Worley	—	—

SH 60	5.510	8.867	WA 274 near Tekoa, WA	US-95 near Tensed	—	—

SH 61	0.740	1.191	WYO 89 near Geneva	US-89 in Geneva	—	—

SH 62	15.410	24.800	US-95 Business in Craigmont	SH-64 / SH-162 in Nezperce	—	—

SH 64	15.409	24.798	SH-62 / SH-162 in Nezperce	SH-162 in Kamiah	—	—

SH 66	0.992	1.596	Palouse Cove Road near Palouse, WA	US-95 near Viola	—	—

SH 67	8.948	14.400	Mountain Home Air Force Base	SH-51 in Mountain Home	—	—

SH 69	8.012	12.894	Orchard Avenue in Kuna	I-84 / US-30 / SH-55 in Meridian	—	—

SH 71	28.730	46.236	US-95 in Cambridge	OR 86 near Brownlee Dam	—	—

SH 72	1.989	3.201	US-30 near New Plymouth	SH-52 at Hamilton Corner	—	—

SH 74	7.835	12.609	US-93 near Knull	US-30 in Twin Falls	—	—

SH 75	170.666	274.660	US-26 / US-93 in Shoshone	US-93 near Challis	—	—

SH 77	30.676	49.368	SH-81 in Malta	I-84 / SH-25 near Declo	—	—

SH 78	99.720	160.484	SH-55 in Marsing	I-84 Business in Hammett	—	—

SH 79	2.564	4.126	I-84 in Jerome	SH-25 in Jerome	—	—

SH 81	33.978	54.682	SH-77 in Malta	US-30 in Burley	1972	current

SH 87	9.133	14.698	US-20 in Island Park	MT 87 near Island Park	—	—

SH 97	35.745	57.526	SH-3 near Harrison	I-90 near Coeur d'Alene	—	—

SH 99	11.686	18.807	SH-3 in Kendrick	SH-8 in Troy	—	—

SH 128	2.198	3.537	WA 128 near Lewiston	US-12 in Lewiston	—	—

SH 162	31.077	50.014	SH-62 / SH-64 in Nezperce	US-12 in Kamiah	—	—

SH 167	16.319	26.263	SH-78 in Grand View	SH-67 near Mountain Home AFB	—	—

SH 200	33.169	53.380	US-2 / US-95 in Ponderay	MT 200 near Clark Fork	—	—

Sentence(s)

State Highway 40 (SH-40) is a 2.737-mile-long (4.405 km) state highway in Idaho, serving Downey.

final_sentence: State Highway 40 (SH-40) is a 2.737-mile-long (4.405 km) state highway in Idaho, serving Downey.