U.S. Route 30 in Idaho
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Route information | ||||
Maintained by IDT | ||||
Length | 455.481 mi[1] (733.026 km) | |||
Existed | 1926 | –present|||
Tourist routes | ![]() | |||
Major junctions | ||||
West end | ![]() | |||
East end | ![]() | |||
Location | ||||
Country | United States | |||
State | Idaho | |||
Counties | Payette, Canyon, Ada, Elmore, Gooding, Twin Falls, Cassia, Minidoka, Power, Bannock, Caribou, Bear Lake | |||
Highway system | ||||
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U.S. Route 30 (US 30) runs northwest–southeast across the southern half of lower Idaho for 455.481 miles (733.026 km). US 30 enters the state from Oregon across the Snake River in Fruitland and exits into Wyoming east of Dingle. US 26 runs through the large population centers of Boise, Twin Falls, and Pocatello, as well as a plethora of smaller communities from Fruitland to Montpelier. The Thousand Springs Scenic Byway is a picturesque section of US 30 in southern Idaho between the towns of Bliss and Buhl, dipping down into the Hagerman Valley and a canyon of the Snake River.
The highway has four extensive concurrencies with Interstate Highways: Interstate 84 (I-84) twice, I-86, and I-15. Outside of its Interstate concurrencies, the route is largely two-lane and rural outside of portions through major towns and cities.
Route description
Oregon state line to Boise
After crossing the Snake River, US 30 enters Fruitland as NW 16th Street before intersecting US 95. The route then turns south along US 95 (Whitley Drive in Fruitland). Just north of the I-84 interchange, US 30 turns east toward New Plymouth. In New Plymouth, US 30 bends south, then southeast, and then south again. Just northeast of the Langley Gulch Power Plant, US 30 begins to travel southeast at a diamond interchange, running concurrently with I-84. Along the way, they serve Sandy Hollow with one diamond interchange. Just north of Caldwell, US 20 and US 26 enter the freeway southeastward, joining with the concurrency. Entering Caldwell, they then serve I-84 BL/SH-19 and 10th Avenue before both US 20 and US 26 left the freeway together on Franklin Road. In Nampa, I-84 and US 30 then serve SH-55, which then travels eastward concurrently with the two routes. The three routes then serve Northside Boulevard, Franklin Boulevard, and Garrity Boulevard (I-84 BL). In Meridian, the freeway concurrency serves SH-69. On the next exit, SH-55 left the concurrency. Then, in Boise, the freeway comes across I-184 which serves Boise City Center. Between exits 52 and 54, the freeway is situated north adjacent to Boise Airport, with exit 53 serving the main terminal. Also, on exit 54, US 20 and US 26 rejoins the freeway.[2]
Boise to Downtown Pocatello
After leaving Boise, the freeway then serves multiple roads (including SH-21) before reaching Mountain Home. In Mountain Home, the freeway serves I-84 BL. At the next exit, US 20 leaves the freeway alone. The three remaining routes went on to serve several more roads (such as I-84 BL and SH-78). Then, in Bliss, US 30 leaves the freeway and enters the Thousand Springs Scenic Byway. As US 30 approaches I-84, the route turns south and east, serving Hagerman, Buhl, Filer, and Twin Falls. North of Kimberly, the route then leaves the byway. In Burley, the route then intersects SH-27 and SH-81. In Heyburn, the route rejoins I-84 while also intersecting SH-24. They then serve SH-25/SH-77 at the exact interchange. Then, US 30 transitions from I-84 to I-86 on a modified interchange. Both I-86 and US 30 serve more roads and places (including Register Rock, I-86 BL, SH-39, and Pocatello Regional Airport). At exit 58, US 30 leaves the freeway as it approaches Pocatello. At this point, US 30 travels along a road parallel to the railroad. Along the way near downtown, it then begins to run concurrently with I-15 BL and US 91. Shortly after that, the concurrently splits into a one-way pair.[2]
Thousand Springs Scenic Byway
The Thousand Springs Scenic Byway is a picturesque section of US 30 in southern Idaho between the towns of Bliss and Buhl, dipping down into the Hagerman Valley and a canyon of the Snake River. The byway takes its name from the numerous streams and rivulets springing forth out of the east wall of that canyon, many of them plainly visible from the road, with the panoramic river in the foreground. These springs are outlets from the Snake River Aquifer, which flows through thousands of square miles of porous volcanic rock and is one of the largest groundwater systems in the world.[3][4] The aquifer is believed to be fed by the Lost River which disappears into lava flows near Arco, about 90 miles (140 km) northeast of Hagerman.
Downtown Pocatello to Wyoming state line
The concurrency returns to a two-way street. It then comes across I-15 at a diamond interchange. At this point, both U.S. routes continue southeast along I-15 while I-15 BL ends there. The three routes (I-15, US 30, and US 91) then serve even more places such as another I-15 BL in Inkom. At exit 47, US 30 leaves the freeway to serve McCammon. At this point, US 30 begins to meander across several mountains. Between Alexander and Soda Springs, SH-34 runs concurrently with US 30. US 30 then serves more towns through the rest of the state, especially Montpelier. In Montpelier, US 89 briefly runs concurrently with US 30.[2]
Major intersections
County | Location | mi[1][5][6][7] | km | Exit | Destinations | Notes |
---|---|---|---|---|---|---|
Payette | Fruitland | 0.000 | 0.000 | ![]() ![]() | Continuation into Oregon | |
0.610 | 0.982 | ![]() ![]() | Western end of US 95 overlap | |||
| 21.530 | 34.649 | ![]() ![]() ![]() ![]() | Eastern end of US 95 overlap; destinations signed eastbound only | ||
| 27.940 | 44.965 | ![]() ![]() | Western terminus of SH-72 | ||
| 31.073– 31.175 | 50.007– 50.171 | 9 | ![]() ![]() | Western end of I-84 overlap | |
| 12.906 | 20.770 | 13 | Black Canyon Junction | ||
Canyon | | 17.335 | 27.898 | 17 | Sand Hollow | |
| 24.839 | 39.974 | 25 | ![]() | ||
| 25.994 | 41.833 | 26 | ![]() ![]() ![]() ![]() | West end of US-20/US-26 overlap | |
Caldwell | 26.723 | 43.006 | 27 | ![]() ![]() ![]() ![]() | ||
27.620 | 44.450 | 28 | 10th Avenue – Caldwell City Center | |||
28.650 | 46.108 | 29 | ![]() ![]() ![]() ![]() | East end of US-20/US-26 overlap | ||
Nampa | 33.539 | 53.976 | 33 | ![]() ![]() | West end of SH-55 overlap; signed as exits 33A (SH-55) and 33B (Midland Blvd.) westbound | |
34.965 | 56.271 | 35 | Northside Boulevard | |||
35.985 | 57.912 | 36 | Franklin Boulevard | |||
37.945 | 61.067 | 38 | ![]() ![]() | |||
Ada | Meridian | 42.000 | 67.592 | 42 | Ten Mile Road | |
44.007 | 70.822 | 44 | ![]() | |||
45.998 | 74.027 | 46 | ![]() ![]() | East end of SH-55 overlap | ||
Boise | 49.307 | 79.352 | 49 | ![]() ![]() | I-184 exit 0 | |
50.140 | 80.693 | 50 | Cole Road / Overland Road | Signed as exits 50A (Overland Rd. west) and 50B (Cole/Overland) eastbound, and 50A (Cole/Overland) and 50B (Overland Rd. east) westbound | ||
51.997 | 83.681 | 52 | Orchard Street | |||
53.483 | 86.073 | 53 | Vista Avenue – Boise Airport | |||
54.485 | 87.685 | 54 | ![]() ![]() ![]() | West end of US-20/US-26 overlap | ||
56.932 | 91.623 | 57 | ![]() | |||
| 59.510 | 95.772 | 59 | S. Eisenman Road / Memory Road | Signed as exits 59A (S. Eisenman Rd.) and 59B (Memory Rd.) eastbound | |
| 63.517 | 102.221 | 64 | Blacks Creek Road – Kuna | ||
Regina | 70.772 | 113.896 | 71 | Mayfield, Orchard | ||
Elmore | | 74.333 | 119.627 | 74 | Simco Road | |
| 90.280 | 145.292 | 90 | ![]() ![]() ![]() ![]() ![]() ![]() | Eastbound signage | |
West Mountain Home | Westbound signage | |||||
Mountain Home | 95.193 | 153.198 | 95 | ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() | East end of US-20 overlap | |
| 99.570 | 160.242 | 99 | Old Oregon Trail Road – Mountain Home | ||
| 111.800 | 179.925 | 112 | ![]() ![]() ![]() ![]() | ||
| 113.856 | 183.233 | 114 | ![]() ![]() ![]() ![]() | Westbound exit and eastbound entrance | |
| 120.149 | 193.361 | 120 | ![]() ![]() | Eastbound exit and westbound entrance | |
| 121.094 | 194.882 | 121 | ![]() ![]() | ||
| 125.159 | 201.424 | 125 | Paradise Valley | ||
| 128.993 | 207.594 | 129 | King Hill | ||
Gooding | Bliss | 172.595 | 277.765 | 137 | ![]() ![]() ![]() ![]() | Eastern end of I-84/US 26 overlap; western end of I-84 Bus. overlap; western terminus of I-84 Bus. |
172.663 | 277.874 | ![]() ![]() ![]() ![]() | Eastern end of I-84 Bus. overlap; Twin Falls signed eastbound, Gooding westbound | |||
Twin Falls | Buhl | North 1500 East Road (SH-46 north) | Southern terminus of SH-46 | |||
| 211.645– 212.612 | 340.610– 342.166 | ![]() | Western end of US 93 Bus. overlap; western terminus of US 93 Bus.; interchange; Sun Valley and Jackpot signed eastbound, Wells westbound | ||
Twin Falls | 217.199– 217.282 | 349.548– 349.681 | ![]() ![]() ![]() ![]() ![]() | Eastern end of US 93 Bus. overlap; to I-84, destinations signed westbound only | ||
217.915 | 350.700 | ![]() ![]() | Northern terminus of SH-74 | |||
| 223.505 | 359.696 | ![]() ![]() ![]() ![]() | Western terminus of SH-50 | ||
Cassia | Burley | 257.481 | 414.376 | ![]() ![]() ![]() | Western end of I-84 Bus. overlap | |
258.628– 258.723 | 416.221– 416.374 | ![]() ![]() | Western terminus of SH-81 | |||
Minidoka | Heyburn | 261.123– 261.754 | 420.237– 421.252 | 211 | ![]() ![]() ![]() ![]() | Eastern end of I-84 Bus. overlap; western end of I-84 overlap;Rupert signed eastbound only; eastern terminus of I-84 Bus.; western terminus of SH-84 |
Cassia | | 216.395 | 348.254 | 216 | ![]() ![]() | |
Minidoka | | 272.947– 0.000 | 439.266– 0.000 | 222 1 | ![]() ![]() ![]() ![]() | Eastern end of I-84 overlap; western end of I-86 overlap |
Cassia | | 14.807 | 23.830 | 15 | Raft River Area | |
Power | | 20.590 | 33.136 | 21 | Coldwater Area | |
| 28.100 | 45.223 | 28 | Massacre Rocks State Park | ||
| 32.620 | 52.497 | 33 | Neeley Area | ||
American Falls | 36.123 | 58.134 | 36 | ![]() ![]() ![]() ![]() | ||
40.110 | 64.551 | 40 | ![]() ![]() ![]() ![]() | |||
| 44.327 | 71.337 | 44 | Seagull Bay | ||
| 49.152 | 79.102 | 49 | Rainbow Road | ||
| 52.491 | 84.476 | 52 | Arbon Valley | ||
| 55.551 | 89.401 | 56 | Pocatello Regional Airport | ||
| 330.820– 330.930 | 532.403– 532.580 | 58 | ![]() ![]() | Eastern end of I-86 overlap; I-86 exit 58 | |
Bannock | Pocatello | 335.778 | 540.382 | ![]() ![]() ![]() ![]() ![]() ![]() | Western end of I-15 Bus./US 91 overlap; to I-15 signed westbound only | |
339.220 | 545.922 | 67 | ![]() ![]() | Eastern end of I-15 Bus. overlap; western end of I-15 overlap; southern terminus of I-15 Bus.; I-15 exit 67 | ||
Portneuf | 63.037 | 101.448 | 63 | Portneuf Road – Portneuf Area | ||
Inkom | 57.694 | 92.849 | 58 | ![]() ![]() | Southbound exit, northbound entrance | |
56.646 | 91.163 | 57 | ![]() ![]() | Northbound exit, southbound entrance | ||
| 359.493 | 578.548 | 47 | ![]() ![]() ![]() ![]() | Eastern end of I-15/US 91 overlap | |
Caribou | | 386.450 | 621.931 | ![]() ![]() | Western end of SH-34 overlap; Bancroft signed westbound only | |
Soda Springs | 405.543 | 652.658 | ![]() ![]() | Eastern end of SH-34 overlap | ||
Bear Lake | Montpelier | 434.712 | 699.601 | ![]() ![]() | Western end of US 89 overlap; destinations signed westbound only | |
435.015 | 700.089 | ![]() ![]() | Eastern end of US 89; only Paris signed westbound | |||
| 455.481 | 733.026 | ![]() ![]() | Continuation into Wyoming | ||
1.000 mi = 1.609 km; 1.000 km = 0.621 mi
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Old Highway 30
Old Highway 30 is an approximately 29.0-mile-long (46.7 km) road in Bannock and Caribou counties in southeastern Idaho, United States, that was the former routing of US 30 in the area and forms a northern loop off US 30. It connects US 30 in Lava Hot Springs with US 30/Idaho State Highway 34 (SH 34) north of Grace.
The two-lane road, originally part of the highway designated as U.S Route 30 North (US 30N),[8] runs around the northern end of the Fish Creek Range. The western end of the road is located within the Gem Valley. The rerouting of US 30 via Fish Creek Summit reduced the distance between Lava Hot Springs and the SH 34 junction by about 11 miles (18 km), but bypassed the city of Bancroft. Notwithstanding, the rerouting still created a more direct route between Lava Hot Springs and Bancroft (via Central Road), reducing driving distance between the cities by about 5.5 miles (8.9 km).[9]
Old Highway 30 begins at a T-intersection on US 30 in the northeastern corner of Lava Hot Springs in Bannock County. From its southern terminus, Old Highway 30 heads northerly, running along the Portneuf River. After only about 0.7 miles (1.1 km) the road crosses the Portneuf River. After continuing a northerly course along the river, for about another 2.0 miles (3.2 km) Old Highway 30 passes through the unincorporated community of Pebble. Roughly 1.3 miles (2.1 km) north of Pebble, the road turn northeasterly to pass by the north end of the Fish Creek Range, while the Portneuf River continues its northerly upstream course. About 1.4 miles (2.3 km) later, Old Highway 30 turns to head southeasterly for the remainder of its course. Approximately 1.4 miles (2.3 km) after turning southeast, and after a short jog to the south, the road reaches the city of Bancroft. Roughly 17.4 miles (28.0 km) its western terminus, Old Highway 30 crosses Main Street in Bancroft. Continuing southeasterly from Bancroft for about 5.6 miles (9.0 km), Old Highway 30 passes through what is left of the unincorporated community of Talmage. Roughly 3.5 miles (5.6 km) beyond Talmage, the road turns due south to its eastern terminus at a junction with US 30/SH 34.[9]
References
- ^ a b "State Highway System Route: 0030" (PDF). Idaho Transportation Department Milepoint Log. Idaho Transportation Department. January 25, 2016. Retrieved November 7, 2020.
- ^ a b c Google (October 10, 2021). "Overview Map of US 30 in Idaho" (Map). Google Maps. Google. Retrieved October 10, 2021.
- ^ "Thousand Springs Scenic Byway". America's Byways. Federal Highway Administration. Archived from the original on August 14, 2013. Retrieved May 2, 2020 – via Wayback Machine.
- ^ "America's Scenic Byways: Thousand Springs Scenic Byway". Scenic Byways. Retrieved May 2, 2020.
- ^ "State Highway System Route: 0093" (PDF). Idaho Transportation Department Milepoint Log. Idaho Transportation Department. January 12, 2016. Retrieved November 7, 2020.
- ^ "State Highway System Route: 0084" (PDF). Idaho Transportation Department Milepoint Log. Idaho Transportation Department. January 12, 2016. Retrieved November 7, 2020.
- ^ "State Highway System Route: 0015" (PDF). Idaho Transportation Department Milepoint Log. Idaho Transportation Department. January 25, 2016. Retrieved November 7, 2020.
- ^ Bureau of Public Roads & American Association of State Highway Officials (November 11, 1926). United States System of Highways Adopted for Uniform Marking by the American Association of State Highway Officials (Map). 1:7,000,000. Washington, D.C.: United States Geological Survey. OCLC 32889555. Retrieved September 21, 2002 – via Wikimedia Commons.
- ^ a b Google (September 21, 2022). "Old Hwy 30, Bancroft, ID 83217" (Map). Google Maps. Google. Retrieved September 21, 2022.
- Use mdy dates from October 2021
- Articles with short description
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- Infobox road instances in Idaho
- U.S. Route 30
- Transportation in Payette County, Idaho
- Transportation in Canyon County, Idaho
- Transportation in Ada County, Idaho
- Transportation in Elmore County, Idaho
- Transportation in Gooding County, Idaho
- Transportation in Twin Falls County, Idaho
- Transportation in Cassia County, Idaho
- Transportation in Minidoka County, Idaho
- Transportation in Power County, Idaho
- Transportation in Bannock County, Idaho
- Transportation in Caribou County, Idaho
- Transportation in Bear Lake County, Idaho
- U.S. Highways in Idaho