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.
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Route information | ||||
Maintained by ITD | ||||
Length | 402.5 mi[1] (647.8 km) | |||
Existed | 1951[2]–present | |||
Major junctions | ||||
West end | ![]() ![]() | |||
East end | ![]() | |||
Location | ||||
Counties | Canyon, Ada, Elmore, Gooding, Lincoln, Blaine, Butte, Bingham, Bonneville | |||
Highway system | ||||
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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
County | Location | mi[1][3][4][5] | km | Exit | Destinations | Notes | |
---|---|---|---|---|---|---|---|
Canyon | | 0.000 | 0.000 | ![]() ![]() | Continuation into Oregon | ||
| 1.578 | 2.540 | ![]() | Western end of US 95 overlap | |||
| 9.647 | 15.525 | ![]() | Eastern end of US 95 overlap | |||
| 21.995– 22.129 | 35.398– 35.613 | 26 | ![]() ![]() | Western end of I-84/US 30 overlap; I-84 exit 26 | ||
Caldwell | 22.858 | 36.786 | 27 | ![]() ![]() | |||
23.755 | 38.230 | 28 | 10th Avenue – Caldwell City Center | ||||
24.840– 24.994 | 39.976– 40.224 | 29 | ![]() ![]() | Eastern end of I-84/US 30 overlap; I-84 exit 29 | |||
Ada | | 34.267 | 55.147 | ![]() | Southern terminus of SH-16 | ||
Boise–Eagle line | 40.229 | 64.742 | ![]() | ||||
Garden City | 44.166 | 71.078 | ![]() ![]() | Eastern terminus of SH-44; to SH-55 signed westbound only | |||
Boise | 47.290– 47.31 | 76.106– 76.14 | ![]() ![]() | Westbound exit and eastbound entrance; interchange; eastern terminus of I-184 | |||
48.050 | 77.329 | River Street — Bogus Basin | Eastbound exit only; interchange | ||||
52.135– 52.412 | 83.903– 84.349 | Federal Way | Interchange | ||||
52.670– 52.824 | 84.764– 85.012 | 54 | ![]() ![]() | Western end of I-84/ US30 overlap; I-84 exit 54 | |||
See I-84 (see mile 54.485–140.405) | |||||||
Gooding | | 138.970 | 223.651 | 141 | ![]() ![]() | Eastern end of I-84 overlap; Hagerman signed eastbound, Bliss westbound | |
Gooding | 150.110 | 241.579 | ![]() ![]() | Hospital signed eastbound only | |||
Lincoln | Shoshone | 165.928 | 267.035 | ![]() | Western end of US 93 overlap | ||
165.968 | 267.100 | ![]() | Southern terminus of SH-75 | ||||
Blaine | Carey | 204.281 | 328.758 | ![]() | Western end of US 20 overlap; Picabo signed northbound, Sun Valley and Boise southbound | ||
Butte | Arco | 248.573 | 400.039 | ![]() ![]() | Eastern end of US 93 overlap; Salmon signed westbound only | ||
| 256.073 | 412.110 | ![]() | Western terminus of SH-33 | |||
| 272.0 | 437.7 | ![]() | Eastern end of US 20 overlap; laboratory signed westbound only | |||
Bingham | | 305.743 | 492.046 | ![]() | Northern terminus of SH-39 | ||
Blackfoot | 305.804– 305.893 | 492.144– 492.287 | Snake River | ||||
305.930– 306.104 | 492.347– 492.627 | 93 | ![]() ![]() | Western end of I-15 overlap; northern terminus of I-15 Bus.; I-15 exit 93 | |||
See I-15 (mile 92.734–115.610) | |||||||
Bonneville | Idaho Falls | 328.980 | 529.442 | 116 | ![]() | Eastern end of I-15 overlap; western end of I-15 Bus. overlap; southern terminus of I-15 Bus.; I-15 exit 116 | |
331.102 | 532.857 | ![]() | Northern terminus of US 91; destination signed eastbound only | ||||
333.044 | 535.982 | ![]() ![]() ![]() ![]() ![]() ![]() | Eastern end of I-15 Bus. overlap; western end of US 20 Bus. overlap; To I-15, Butte signed eastbound only | ||||
334.374 | 538.123 | ![]() ![]() | Eastern end of US 20 Bus. overlap | ||||
Beachs Corner | 338.123– 338.240 | 544.156– 544.345 | ![]() | Southern terminus of SH-43 | |||
| 347.787 | 559.709 | ![]() ![]() | Western terminus of US 26 Bus.; destinations signed eastbound only | |||
| 349.294 | 562.134 | ![]() ![]() ![]() ![]() | Eastern terminus of US 26 Bus. | |||
Swan Valley | 376.950 | 606.642 | ![]() | Southern terminus of SH-31 | |||
| 402.500 | 647.761 | ![]() | Continuation into Wyoming | |||
1.000 mi = 1.609 km; 1.000 km = 0.621 mi
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Ririe business route
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Location | Ririe |
Length | 2.981 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.
Location | mi[1] | km | Destinations | Notes | |
---|---|---|---|---|---|
| 0.000 | 0.000 | ![]() | Western terminus of US 26 Bus.; continues as North 115th East beyond US 26 | |
Ririe | 1.891 | 3.043 | ![]() | Eastern terminus of SH-48 | |
| 28.981 | 46.640 | ![]() | Eastern terminus | |
1.000 mi = 1.609 km; 1.000 km = 0.621 mi |
References
- "State Highway System Route: 0026" (PDF). Idaho Transportation Department Milepoint Log. Idaho Transportation Department. January 25, 2016. Retrieved November 7, 2020.
- Elbert, Chris; et al. (October 7, 2020). "ern end of US Highway 26". USEnds.com. Retrieved November 7, 2020.
- "State Highway System Route: 0020" (PDF). Idaho Transportation Department Milepoint Log. Idaho Transportation Department. January 25, 2016. Retrieved November 5, 2020.
- "State Highway System Route: 0093" (PDF). Idaho Transportation Department Milepoint Log. Idaho Transportation Department. January 12, 2016. Retrieved November 6, 2020.
- "State Highway System Route: 0015" (PDF). Idaho Transportation Department Milepoint Log. Idaho Transportation Department. January 25, 2016. Retrieved November 7, 2020.