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Interstate 15 in Montana: Wikis

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I-15 (big).svg
Interstate 15
Main route of the Interstate Highway System
Maintained by Montana Department of Transportation
Length: 397.5 mi[1] (639.71 km)
South end: I-15 at Idaho state line
Major
junctions:
I-90 in Butte
I-115 in Butte
US 287 in Helena
US 89 in Great Falls
US 2 in Shelby
North end: Hwy 4 at Canadian border near Sweetgrass
Montana Highways
< MT 13 MT 16 >

In the U.S. state of Montana, Interstate 15 continues onward from Idaho for nearly 400 miles (640 km) through the cities of Butte, Helena and Great Falls, intersecting with Interstate 90, Interstate 115 and Interstate 315. Interstate 15 reaches its northern terminus at the international border with Alberta, Canada.

Interstate 15 joins with I-90 and makes a junction with a short, one-mile (1.6 km) spur route Interstate 115 in Butte.

From Helena to Sweetgrass at the Canadian border, Interstate 15 is dedicated as a memorial highway to the First Special Service Force.

Exit list

County Location Mile # Destinations Notes
Beaverhead 0 Monida (S-509)
9 Snowline
Lima 15 Lima
23 Dell
29 Kidd
37 Red Rock
44 S-324 – Clark Canyon Reservoir
51 Dalys Southbound exit and northbound entrance
52 Grasshopper Creek
56 Barretts
59 S-278 (S-222) – Jackson, Wisdom
62 I-15 Bus. north – Dillon
Dillon 63 I-15 Bus. south to MT 41Dillon, Twin Bridges
74 Birch Creek, Apex
85 Glen
Madison 93 Melrose
Silver Bow 99 Moose Creek Road
102 MT 43 – Divide, Wisdom
111 Feely
116 Buxton
119 Hub Access, Silver Bow
121 I-90 west – Missoula South end of I-90 overlap
122 Rocker (S-276)
Butte 124 I-115 east (I-15 Bus. north, I-90 Bus. east) – Butte City Center Northbound exit and southbound entrance
126 Montana Street
127 I-15 Bus. south / I-90 Bus. west (Harrison Avenue, MT 2) Signed as exits 127A (south) and 127B (north)
129 I-90 east – Billings North end of I-90 overlap
Jefferson 134 Woodville
138 Elk Park
151 Bernice
156 Basin
160 High Ore Road
164 MT 69Boulder
176 Jefferson City
182 Clancy
187 S-518 (S-282) – Montana City
Lewis and Clark Helena 190 South Helena/Nob Hill area
192 I-15 Bus. north / US 12 / US 287 south – Townsend, Capitol Area
193 I-15 Bus. south (Cedar Street)
200 S-279 / S-453 (Lincoln Road)
209 Gates of the Mountains
216 Sieben
219 Spring Creek Northbound exit and southbound entrance
226 S-434 – Wolf Creek
228 US 287 north – Augusta, Choteau North end of US 287 overlap
234 Craig
Cascade 240 Dearborn
244 Canyon Access
247 Hardy Creek
250 Local Access
254 File:MT-68.svg MT 68Cascade
256 File:MT-68.svg MT 68Cascade
270 S-330Ulm
Great Falls 277 Great Falls International Airport
278 I-15 Bus. north / US 89 south / MT 200 east (10th Avenue South, I-315 east, MT 3 south) South end of US 89/MT 200 overlap
280 I-15 Bus. south to US 87 north (Central Avenue West)
282 To US 87 north / Northwest Bypass Southbound exit and northbound entrance
286 Manchester
290 US 89 north / MT 200 west – Missoula, Choteau North end of US 89/MT 200 overlap
297 Gordon
Teton 302 S-431Power
313 S-221 / S-379Dutton, Choteau
321 Collins Road
Pondera 328 S-365 – Brady
335 I-15 Bus. north (Midway Road) – Conrad
Conrad 339 I-15 Bus. south – Conrad
345 File:MT-sec-366.svg S-366 (Ledger Road) – Tiber Dam
348 MT 44 (Valier Road)
352 Bullhead Road
Toole 358 Golf Course Road, Marias Valley Road
Shelby 363 I-15 Bus. north / US 2Shelby, Cut Bank
364 I-15 Bus. south – Shelby
369 Bronken Road
373 Potter Road
379 S-215 / S-343Kevin, Oilmont
385 Swayze Road
Sunburst 389 S-552Sunburst
394 Ranch Access
397 Sweetgrass (S-214)
Canadian border

References

Interstate 15
Previous state:
Idaho
Montana Next state:
Terminus
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