Interstate 15 in Montana

Interstate 15
Route information
Maintained by Montana Department of Transportation
Length:	397.5 mi (639.71 km)
Major junctions
South end:	I-15 at Idaho state line
	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
Highway system
Interstate Highway System Main Auxiliary Business 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	km	Exit	Destinations	Notes
Monida Pass		0.000	0.000	I-15 continues south towards Idaho Falls
		0.509	0.819	0	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	S-324 west – 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	S-278 west – Jackson, Wisdom
	Dillon	62.440	100.487	62	I-15 Bus. north – Dillon
		63.813	102.697	63	I-15 Bus. south / MT 41 – Dillon
		75.046	120.775	74	Apex, Birch Creek
		85.272	137.232	85	Glen
Madison	Melrose	93.188	149.972	93	Melrose
Silver Bow		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 – Missoula, Butte	South end of I-90 overlap
		122.491	197.130	122	Rocker
	Butte	124.319	200.072	124	I-115 / I-15 Bus. / I-90 Bus. – City Center
		126.343	203.329	126	Montana Street
		127.961	205.933	127	Harrison Avenue	signed as exits 127A and 127B eastbound
		129.498	208.407	129	I-90 – Billings	North end of I-90 overlap; I-15 numbered as exit
Jefferson				134	Woodville
				138	Elk Park
				151	Bernice
				156	Basin
				160	High Ore Road
				164	MT 69 – Boulder
				176	Jefferson City
				182	Clancy
				187	S-518 (Sec-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	South end of US 287 overlap
				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	MT 68 – Cascade
				256	MT 68 – Cascade
				270	S-330 – Ulm
	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-431 – Power
				313	S-221 / S-379 – Dutton, 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	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 2 – Shelby, Cut Bank
				364	I-15 Bus. south – Shelby
				369	Bronken Road
				373	Potter Road
				379	S-215 / S-343 – Kevin, Oilmont
				385	Swayze Road
	Sunburst			389	S-552 – Sunburst
				394	Ranch Access
				397	Sweetgrass (S-214)
				Canadian border
Concurrency terminus       Closed/former       HOV only       Incomplete access       Tolled/ETC       Unopened

External links

Template:Attached_KML/Interstate 15 in Montana

Interstate 15
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