Interstate 15 in Montana
Route map:
First Special Service Force Memorial Highway | ||||
Route information | ||||
Maintained by MDT | ||||
Length | 396.030 mi[1] (637.349 km) | |||
NHS | Entire route | |||
Major junctions | ||||
South end | I-15 at the Idaho state line | |||
North end | Sweetgrass | |||
Location | ||||
Country | United States | |||
State | Montana | |||
Counties | Beaverhead, Madison, Silver Bow, Jefferson, Lewis and Clark, Cascade, Teton, Pondera, Toole | |||
Highway system | ||||
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In the
.I-15 joins with I-90 and makes a junction with a short, one-mile (1.6 km) spur route I-115 in Butte.
Route description
I-15 crosses into Montana from Idaho just south of
trumpet interchange.[3]
I-15 and I-90 run concurrently through the city of
I-115, signed as Business Loop 15 and Business Loop 90. I-15 and I-90 pass through a green area in the middle of the city, before I-15 splits off to the northeast on the eastern end of the town. The freeway climbs along the eastern edge of the Continental Pit mine, and then over continental divide at Elk Park Pass.[2] I-15 travels through the forest and plains of Elk Park before winding along Bison Creek and later the Boulder River. I-15 passes through the town of Basin before leaving the mountains and providing access to Boulder. Paralleling Beavertown Creek, the road winds through the hills before passing through Jefferson City. The freeway continues into Helena, where I-15 intersects US 12 and runs concurrently with US 287 through the outskirts of the city before continuing north through the plains.[3]
I-15 and US 287 continue along Little Prickly Pear Creek before passing through the town of
I-315 and US 89 intersect with I-15 at a trumpet interchange, and US 89 continues north and then northwest along I-15 for a few miles before continuing to the west.[3] I-15 continues northwest through farmland before passing near Dutton and Brady, and the city of Conrad. US 2 intersects I-15 in the town of Shelby. The freeway passes through the town of Sunburst, then passes through a final stretch of farmland. Eventually, I-15 passes through the last town before Canada, Sweet Grass, and then crosses the international border, becoming Alberta Highway 4.[3]
History
In 1996, I-15 between Helena and Sweet Grass was renamed the "First Special Service Force Memorial Highway".[4] It was chosen because it was the route taken in 1942 by the Canadian volunteers to join their American counterparts for training at Fort Harrison.[4]
Exit list
County | Location | mi[1] | km | Exit | Destinations | Notes |
---|---|---|---|---|---|---|
Monida Pass | 0.000 | 0.000 | I-15 south – Idaho Falls | Continuation into Idaho | ||
0.509 | 0.819 | 0 | S-509 – Monida | |||
Beaverhead | | 9.544 | 15.360 | 9 | Snowline (ranch access) | |
Lima | 15.185 | 24.438 | 15 | Lima | ||
Dell | 23.832 | 38.354 | 23 | Dell | ||
| 29.609 | 47.651 | 29 | Kidd | ||
| 37.353 | 60.114 | 37 | Red Rock | ||
| 44.454 | 71.542 | 44 | Clark Canyon Reservoir | ||
| 51.199 | 82.397 | 51 | Dalys | Southbound exit and northbound entrance only | |
| 52.613 | 84.672 | 52 | Grasshopper Creek | ||
| 56.028 | 90.168 | 56 | Barretts | ||
| 59.702 | 96.081 | 59 | |||
I-15 BL north – Dillon | ||||||
63.813 | 102.697 | 63 | MT 41 – Dillon | |||
| 75.046 | 120.775 | 74 | Apex, Birch Creek | ||
| 85.272 | 137.232 | 85 | Glen | ||
Madison | | 93.188 | 149.972 | 93 | Melrose (I-15 Frontage Road/Camp Creek Road) | |
Silver Bow | Butte | 99.266 | 159.753 | 99 | Moose Creek Road | |
102.515 | 164.982 | 102 | MT 43 west – Wisdom | |||
111.271 | 179.073 | 111 | Feely | |||
116.361 | 187.265 | 116 | Buxton | |||
119.970 | 193.073 | 119 | Hub Access – Silver Bow | |||
121.462 | 195.474 | 121 | I-90 west – Missoula | South end of I-90 overlap; I-90 east exit 219; left exits; left entrance northbound | ||
122.491 | 197.130 | 122 | Rocker | |||
124.319 | 200.072 | 124 | I-90 BL east – City Center | Northbound exit and southbound entrance | ||
126.343 | 203.329 | 126 | Montana Street | |||
127.961 | 205.933 | 127 | I-90 BL west (Harrison Avenue) | Signed as exits 127A and 127B northbound; I-15 Bus./I-90 Bus. not signed northbound | ||
129.498 | 208.407 | 129 | I-90 east – Bozeman | North end of I-90 overlap; I-90 west exit 227; left exits; left entrance southbound | ||
Jefferson | | 134.061 | 215.750 | 134 | Woodville | |
| 138.698 | 223.213 | 138 | Elk Park | ||
| 151.226 | 243.375 | 151 | Bernice | ||
| 156.391 | 251.687 | 156 | Basin | ||
| 159.831 | 257.223 | 160 | High Ore Road | ||
| 164.406 | 264.586 | 164 | MT 69 – Boulder | ||
| 175.576 | 282.562 | 176 | Jefferson City | ||
| 181.575 | 292.217 | 182 | Clancy | ||
| 187.161 | 301.206 | 187 | S-518 (Sec-282) – Montana City | ||
Lewis and Clark | Helena | 189.986 | 305.753 | 190 | South Helena, Nob Hill area | |
191.602 | 308.354 | 192 | Area | South end of US 287 overlap | ||
192.772 | 310.236 | 193 | I-15 BL south (Cedar Street) | |||
193.468 | 311.357 | 194 | Custer Avenue | |||
199.535 | 321.120 | 200 | S-279 / S-453 (Lincoln Road) | |||
| 208.573 | 335.666 | 209 | Gates of the Mountains | ||
| 215.440 | 346.717 | 216 | Sieben | ||
| 218.667 | 351.910 | 219 | Spring Creek | Northbound exit and southbound entrance | |
| 226.223 | 364.071 | 226 | S-434 – Wolf Creek | ||
| 228.022 | 366.966 | 228 | US 287 north – Augusta, Choteau | North end of US 287 overlap | |
| 233.698 | 376.100 | 234 | Craig | ||
Cascade | | 239.817 | 385.948 | 240 | Dearborn | |
| 243.533 | 391.928 | 244 | Canyon Access | ||
| 246.807 | 397.197 | 247 | Hardy Creek | ||
| 249.531 | 401.581 | 250 | Local Access | ||
| 254.042 | 408.841 | 254 | MT 68 – Cascade | ||
| 255.555 | 411.276 | 256 | MT 68 – Cascade | ||
| 269.495 | 433.710 | 270 | S-330 – Ulm | ||
Great Falls | 276.889 | 445.610 | 277 | Great Falls International Airport | ||
278.063 | 447.499 | 278 | I-315 east, MT 3 south) | South end of US 89/MT 200 overlap | ||
279.652 | 450.056 | 280 | I-15 BL south to US 87 north (Central Avenue West) | |||
281.631 | 453.241 | 282 | To US 87 north / Northwest Bypass | Southbound exit and northbound entrance | ||
| 285.509 | 459.482 | 286 | Manchester | ||
| 289.607 | 466.077 | 290 | US 89 north / MT 200 west – Missoula, Choteau | North end of US 89/MT 200 overlap | |
| 296.752 | 477.576 | 297 | Gordon | ||
Teton | | 301.528 | 485.262 | 302 | S-431 – Power | |
| 311.672 | 501.587 | 313 | S-221 / S-379 – Dutton, Choteau | ||
| 319.467 | 514.132 | 321 | Collins Road | ||
Pondera | | 326.128 | 524.852 | 328 | S-365 – Brady | |
| 333.507 | 536.727 | 335 | I-15 BL north (Midway Road) – Conrad | ||
I-15 BL south – Conrad | ||||||
| 343.245 | 552.399 | 345 | Tiber Dam | ||
| 346.250 | 557.235 | 348 | MT 44 (Valier Road) | ||
| 350.259 | 563.687 | 352 | Bullhead Road | ||
Toole | | 356.788 | 574.195 | 358 | Golf Course Road, Marias Valley Road | |
| 362.601 | 583.550 | 364 | I-15 BL south – Shelby | ||
| 367.118 | 590.819 | 369 | Bronken Road | ||
| 371.114 | 597.250 | 373 | Potter Road | ||
| 377.123 | 606.921 | 379 | S-215 / S-343 – Kevin, Oilmont | ||
| 383.128 | 616.585 | 385 | Swayze Road | ||
Sunburst | 387.677 | 623.906 | 389 | S-552 – Sunburst | ||
| 391.930 | 630.750 | 394 | Ranch Access | ||
Sweetgrass (S-214 ) | ||||||
396.030 | 637.349 | Sweetgrass-Coutts Border Crossing; Canada–United States border | ||||
Lethbridge | Continuation into Alberta | |||||
1.000 mi = 1.609 km; 1.000 km = 0.621 mi
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References
- ^ a b Staff (2011). Montana Road Log (PDF) (Report). Montana Department of Transportation. pp. 2–8. Retrieved December 21, 2013.
- ^ a b Montana Department of Transportation (2009). Montana Highway Map (PDF) (Map). Helena: Montana Department of Transportation.
- ^ a b c d Google (December 22, 2013). "Interstate 15 in Montana" (Map). Google Maps. Google. Retrieved December 22, 2013.
- ^ a b "Highway renaming set for this weekend". The Lethbridge Herald. September 15, 1999. p. 4. Retrieved February 20, 2017 – via NewspaperArchive.com.
External links
KML is from Wikidata