U.S. Route 30 in Idaho
U.S. Highway 30 | ||||
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Route information | ||||
Maintained by IDT | ||||
Length | 455.481 mi[1] (733.026 km) | |||
Existed | 1926 | –present|||
Tourist routes | Thousand Springs Scenic Byway | |||
Major junctions | ||||
West end | US 30 in Fruitland | |||
East end | US 30 near Dingle | |||
Location | ||||
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 | US 30 west – Ontario | Continuation into Oregon | |
0.610 | 0.982 | US 95 north (North Whitley Drive) / NW 16th Street – Payette, Weiser | Western end of US 95 overlap | |||
| 21.530 | 34.649 | US 95 south to I-84 – Parma, Winnemucca | Eastern end of US 95 overlap; destinations signed eastbound only | ||
| 27.940 | 44.965 | SH-72 east – Emmett | Western terminus of SH-72 | ||
| 31.073– 31.175 | 50.007– 50.171 | 9 | I-84 west – Ontario | Western end of I-84 overlap | |
| 12.906 | 20.770 | 13 | |||
Canyon | | 17.335 | 27.898 | 17 | ||
| 24.839 | 39.974 | 25 | SH-44 – Middleton | ||
| 25.994 | 41.833 | 26 | US 20 west / US 26 west – Parma, Notus | West end of US-20/US-26 overlap | |
Caldwell | 26.723 | 43.006 | 27 | east to SH-19 – Caldwell, Wilder, Homedale | ||
27.620 | 44.450 | 28 | 10th Avenue – Caldwell City Center | |||
28.650 | 46.108 | 29 | US 20 east / US 26 east (Franklin Road) | East end of US-20/US-26 overlap | ||
Nampa | 33.539 | 53.976 | 33 | SH-55 south / Midland Boulevard – Nampa, Marsing | 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 | west (Garrity Boulevard) – Nampa, Murphy | |||
Ada | Meridian | 42.000 | 67.592 | 42 | Ten Mile Road | |
44.007 | 70.822 | 44 | SH-69 – Meridian, Kuna | |||
45.998 | 74.027 | 46 | SH-55 north – McCall, Eagle | East end of SH-55 overlap | ||
Boise | 49.307 | 79.352 | 49 | I-184 east / Franklin Road – City Center | 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 | US 20 / US 26 west (Broadway Avenue) | West end of US-20/US-26 overlap | ||
56.932 | 91.623 | 57 | SH-21 (Gowen Road) – Idaho City | |||
| 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 | ||
70.772 | 113.896 | 71 | , | |||
Elmore | | 74.333 | 119.627 | 74 | Simco Road | |
| 90.280 | 145.292 | 90 | I-84 BL east to SH-51 / SH-67 – Mountain Home, Bruneau | Eastbound signage | |
West Mountain Home | Westbound signage | |||||
Mountain Home | 95.193 | 153.198 | 95 | US 20 east (Sun Valley Highway) / I-84 BL west / SH-51 south (American Legion Boulevard) to SH-67 – Mountain Home, Fairfield | East end of US-20 overlap | |
| 99.570 | 160.242 | 99 | Old Oregon Trail Road – Mountain Home | ||
| 111.800 | 179.925 | 112 | I-84 BL east to SH-78 – Hammett | ||
| 113.856 | 183.233 | 114 | I-84 BL west to SH-78 / Cold Springs Road – Hammett | Westbound exit and eastbound entrance | |
| 120.149 | 193.361 | 120 | I-84 BL east – Glenns Ferry | Eastbound exit and westbound entrance | |
| 121.094 | 194.882 | 121 | I-84 BL west – King Hill, Glenns Ferry | ||
| 125.159 | 201.424 | 125 | |||
| 128.993 | 207.594 | 129 | King Hill | ||
Gooding | Bliss | 172.595 | 277.765 | 137 | I-84 east / US 26 east / Old U.S. 30 – Twin Falls | 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 | To I-84 / US 26 (I-84 Bus. east) / South 750 East – Twin Falls, Gooding | 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 | US 93 – Sun Valley, Jackpot, Wells | 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 | north (Addison Avenue) to I-84 – Jerome, Sun Valley | Eastern end of US 93 Bus. overlap; to I-84, destinations signed westbound only | ||
217.915 | 350.700 | SH-74 south (Shoshone Street South) / Shoshone Street East – Wells | Northern terminus of SH-74 | |||
| 223.505 | 359.696 | SH-50 east to I-84 / North 3500 East – Burley, Pocatello | Western terminus of SH-50 | ||
Cassia | Burley | 257.481 | 414.376 | west / SH-27 (Overland Avenue) – Oakley, Paul | Western end of I-84 Bus. overlap | |
258.628– 258.723 | 416.221– 416.374 | SH-81 east / Airport Way – Declo | Western terminus of SH-81 | |||
Minidoka | Heyburn | 261.123– 261.754 | 420.237– 421.252 | 211 | I-84 west / SH-24 west – Twin Falls, Rupert | 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 | SH-25 / SH-77 – Albion, Rupert, Declo | |
Minidoka | | 272.947– 0.000 | 439.266– 0.000 | 222 1 | I-84 east / I-86 begins – Ogden, Salt Lake | 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 | Area | |
| 28.100 | 45.223 | 28 | Massacre Rocks State Park | ||
| 32.620 | 52.497 | 33 | Neeley Area | ||
American Falls | 36.123 | 58.134 | 36 | SH-37 south / I-86 BL east – Rockland, American Falls | ||
40.110 | 64.551 | 40 | SH-39 north / I-86 BL west – Aberdeen, American Falls | |||
| 44.327 | 71.337 | 44 | |||
| 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 | I-86 east / Tank Farm Road – Idaho Falls | Eastern end of I-86 overlap; I-86 exit 58 | |
Bannock | Pocatello | 335.778 | 540.382 | I-15 BL north / US 91 north (Yellowstone Avenue) to I-15 / East Oak Street – Blackfoot, Idaho Falls | Western end of I-15 Bus./US 91 overlap; to I-15 signed westbound only | |
339.220 | 545.922 | 67 | I-15 north / South Fifth Avenue – Idaho Falls | Eastern end of I-15 Bus. overlap; western end of I-15 overlap; southern terminus of I-15 Bus.; I-15 exit 67 | ||
63.037 | 101.448 | 63 | Portneuf Road – | |||
Inkom | 57.694 | 92.849 | 58 | I-15 BL south – Inkom | Southbound exit, northbound entrance | |
56.646 | 91.163 | 57 | I-15 BL north – Inkom | Northbound exit, southbound entrance | ||
| 359.493 | 578.548 | 47 | I-15 south / US 91 south / East Merrill Road – Arimo, Salt Lake | Eastern end of I-15/US 91 overlap | |
Caribou | | 386.450 | 621.931 | SH-34 south / Old US 30 – Grace, Bancroft | Western end of SH-34 overlap; Bancroft signed westbound only | |
Soda Springs | 405.543 | 652.658 | SH-34 north (South Third Street) / South Third Street – Wayan, Jackson | Eastern end of SH-34 overlap | ||
Bear Lake | Montpelier | 434.712 | 699.601 | US 89 north (Clay Street) / Clay Street – , Jackson | Western end of US 89 overlap; destinations signed westbound only | |
435.015 | 700.089 | US 89 south (Washington Street) / Washington Street – Paris, , Logan, Salt Lake | Eastern end of US 89; only Paris signed westbound | |||
| 455.481 | 733.026 | US 30 east | Continuation into Wyoming | ||
1.000 mi = 1.609 km; 1.000 km = 0.621 mi
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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.
- 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