U.S. Route 26 in Idaho

U.S. Route 26 (US 26) runs east–west across south central Idaho for 402.5 miles (647.8 km). US 26 enters the state from Oregon across the Snake River east of Nyssa, Oregon concurrent with US 20 and exits into Montana northwest of Alpine, Wyoming. US 26 runs through the large population centers of Boise and Idaho Falls, as well as the smaller communities of Parma, Notus, Garden City, Shoshone, Richfield, Carey, Arco, Swan Valley, and Irwin.

This article is about the section of U.S. Route 26 in Idaho. For the entire route, see U.S. Route 26.

U.S. Highway 26
Route information
Maintained by ITD
Length402.5 mi[1] (647.8 km)
Existed1951 (1951)[2]–present
Major junctions
West end US 20 / US 26 near Nyssa, OR
 
East end US 26 near Alpine, WY
Location
CountiesCanyon, Ada, Elmore, Gooding, Lincoln, Blaine, Butte, Bingham, Bonneville
Highway system
  • State Highways in Idaho
← SH-25→ SH-27

For a vast majority of its route, US 26 is two-lane and rural, with the exception of portions in and around major towns and cities. It does have significant four-lane segments within the Boise metropolitan area and east of Idaho Falls. Despite its extensive length, US 26 has many hundreds of miles that run concurrently with other highways. In fact, its first 138.97 miles (223.65 km) in the state consists of concurrencies with any one of five different highways, principally US 20 and I-84. It has additional lengthy concurrencies with US 93, US 20 again, and I-15.

US 26 does have one business route in the state of Idaho, which runs through the small community of Ririe northeast of Idaho Falls.

History

When US 26 was initially designated in the state in 1951, it ran only as far west as Idaho Falls. The next year, it was extended into Oregon.[2]

Major intersections
CountyLocationmi[1][3][4][5]kmExitDestinationsNotes
Canyon​0.0000.000 US 20 west (East Main Street) / US 26 west – NyssaContinuation into Oregon
​1.5782.540 US 95 north / Anderson Corner Road – Fruitland, PayetteWestern end of US 95 overlap
​9.64715.525 US 95 south – Wilder, WinnemuccaEastern end of US 95 overlap
​21.995–
22.129		35.398–
35.613		26 I-84 west / US 30 west / Old Highway 30 – OntarioWestern end of I-84/US 30 overlap; I-84 exit 26
Caldwell22.85836.78627 I-84 BL east to SH-19 – Caldwell, Wilder, Homedale
23.75538.2302810th Avenue – Caldwell City Center
24.840–
24.994		39.976–
40.224		29 I-84 east / US 30 east / Franklin Road – Caldwell, BoiseEastern end of I-84/US 30 overlap; I-84 exit 29
Ada​34.26755.147 SH-16 north (Central Valley Expressway) / North McDermott Road – EmmettSouthern terminus of SH-16
Boise–Eagle line40.22964.742 SH-55 (North Eagle Road) – Meridian, Eagle, McCall
Garden City44.16671.078 SH-44 west (North Glenwood Street) to SH-55 / North Glenwood Street – Eagle, McCallEastern terminus of SH-44; to SH-55 signed westbound only
Boise47.290–
47.31		76.106–
76.14		 I-184 west to I-84Westbound exit and eastbound entrance; interchange; eastern terminus of I-184
48.05077.329River Street —  Bogus BasinEastbound exit only; interchange
52.135–
52.412		83.903–
84.349		Federal WayInterchange
52.670–
52.824		84.764–
85.012		54 I-84 west / US 30 west / Commerce Avenue – NampaWestern end of I-84/ US30 overlap; I-84 exit 54
See I-84 (see mile 54.485–140.405)
Gooding​138.970223.651141 I-84 east to US 30 – Twin Falls, Bliss, HagermanEastern end of I-84 overlap; Hagerman signed eastbound, Bliss westbound
Gooding150.110241.579 SH-46 (Main Street) – Wendell, FairfieldHospital signed eastbound only
LincolnShoshone165.928267.035 US 93 south (South Greenwood Street) / South Rail Street East – Twin FallsWestern end of US 93 overlap
165.968267.100 SH-75 north (North Greenwood Street) / North Rail Street West – Sun ValleySouthern terminus of SH-75
BlaineCarey204.281328.758 US 20 west (Queen Crown Road) / Cenarrusa Lane – Picabo, Sun Valley, BoiseWestern end of US 20 overlap; Picabo signed northbound, Sun Valley and Boise southbound
ButteArco248.573400.039 US 93 north (North Front Street) / East Grand Avenue – Mackay, SalmonEastern end of US 93 overlap; Salmon signed westbound only
​256.073412.110 SH-33 east – HoweWestern terminus of SH-33
​272.0437.7 US 20 east / East Portland Avenue – Idaho Falls, Idaho National LaboratoryEastern end of US 20 overlap; laboratory signed westbound only
Bingham​305.743492.046 SH-39 south – AberdeenNorthern terminus of SH-39
Blackfoot305.804–
305.893		492.144–
492.287		Snake River
305.930–
306.104		492.347–
492.627		93 I-15 south / I-15 BL south – Pocatello, BlackfootWestern end of I-15 overlap; northern terminus of I-15 Bus.; I-15 exit 93
See I-15 (mile 92.734–115.610)
BonnevilleIdaho Falls328.980529.442116 I-15 north / West 33rd South – Idaho Falls, ButteEastern end of I-15 overlap; western end of I-15 Bus. overlap; southern terminus of I-15 Bus.; I-15 exit 116
331.102532.857 US 91 south (South Yellowstone Avenue) / West Sunnyside Road – AmmonNorthern terminus of US 91; destination signed eastbound only
333.044535.982
I-15 BL north / US 20 Bus. west (West Broadway Street) to I-15 / Elm Street – Butte, Arco		Eastern end of I-15 Bus. overlap; western end of US 20 Bus. overlap; To I-15, Butte signed eastbound only
334.374538.123
US 20 Bus. north (North Holmes Avenue) / North Holmes Avenue – West Yellowstone		Eastern end of US 20 Bus. overlap
Beachs Corner338.123–
338.240		544.156–
544.345		 SH-43 north (North Yellowstone Highway) / Ammon Road – RigbySouthern terminus of SH-43
​347.787559.709
US 26 Bus. east (East Ririe Highway) / North 115th East Road – Rigby, Roberts, Ririe		Western terminus of US 26 Bus.; destinations signed eastbound only
​349.294562.134
US 26 Bus. west (130th Road East) to SH-48 – Ririe		Eastern terminus of US 26 Bus.
Swan Valley376.950606.642 SH-31 north – Victor, DriggsSouthern terminus of SH-31
​402.500647.761 US 26 east – JacksonContinuation into Wyoming
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

Ririe business route

U.S. Highway 26 Business
LocationRirie
Length2.981 mi[1] (4.797 km)

U.S. Route 26 Business (US 26 Bus.) is a 2.981-mile-long (4.797 km) business route in and around the small town of Ririe northeast of Idaho Falls. It connects US 26 to the community as well as SH-48.

The entire route is in Bonneville County.

Locationmi[1]kmDestinationsNotes
​0.0000.000 US 26 (East Ririe Highway) / North 115th East – Idaho Falls, Pocatello, Swan ValleyWestern terminus of US 26 Bus.; continues as North 115th East beyond US 26
Ririe1.8913.043 SH-48 west (East County Line Road) – RigbyEastern terminus of SH-48
​28.98146.640 US 26 – Idaho Falls, Swan Valley, JacksonEastern terminus
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

References
  1. "State Highway System Route: 0026" (PDF). Idaho Transportation Department Milepoint Log. Idaho Transportation Department. January 25, 2016. Retrieved November 7, 2020.
  2. Elbert, Chris; et al. (October 7, 2020). "ern end of US Highway 26". USEnds.com. Retrieved November 7, 2020.
  3. "State Highway System Route: 0020" (PDF). Idaho Transportation Department Milepoint Log. Idaho Transportation Department. January 25, 2016. Retrieved November 5, 2020.
  4. "State Highway System Route: 0093" (PDF). Idaho Transportation Department Milepoint Log. Idaho Transportation Department. January 12, 2016. Retrieved November 6, 2020.
  5. "State Highway System Route: 0015" (PDF). Idaho Transportation Department Milepoint Log. Idaho Transportation Department. January 25, 2016. Retrieved November 7, 2020.
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