Misplaced Pages

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34-471: I-15 joins with I-90 and makes a junction with a short, one-mile (1.6 km) spur route I-115 in Butte . I-15 crosses into Montana from Idaho just south of Lima Reservoir over Monida Pass , at 6,870 feet (2,090 m), the highest elevation on the entire route of I-15. The route continues northwest through farmland and desert. The freeway turns north at Clark Canyon Reservoir , before turning northeast. In

68-572: A partial cloverleaf interchange serving extreme northwest Mineral County and access to Lookout Pass Ski and Recreation Area . The highway continues southeasterly through woodlands, paralleling the St. Regis River , before meeting the Dena Mora (Lookout Pass) rest area 4.7 miles (7.6 km) east of the Idaho–Montana border. About 0.5 miles (0.80 km) from the rest stop is a diamond interchange , serving

102-504: A few miles before continuing to the west. 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 . In 1996, I-15 between Helena and Sweet Grass

136-524: 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 . 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

170-594: A section of I-90 was closed for 19 days due to a train derailment and chlorine spill near Alberton . The 2012 Billings area I-90 corridor planning study recommends many improvements to the corridor from Laurel through Lockwood, including construction of new east and westbound bridges over the Yellowstone River, with each bridge having three to four traffic lanes. Also recommended are construction of additional eastbound and westbound traffic lanes from Shiloh to Johnson Lane and reconstruction and widening of many of

204-520: A small minor road into the St. Joe National Forest in Idaho. The highway continues, winding through the woodlands until another diamond interchange, serving the small unincorporated community of Saltese . Continuing east for about six miles (9.7 km), each direction diverges for a small distance before returning side to side for a diamond interchange serving the unincorporated community of Haugan . Two miles (3.2 km) after Haugan, I-90 intersects

238-464: Is land and 3.8 square miles (9.8 km ) (0.3%) is water. Mineral County has voted for the Republican Party candidate in all national elections since 2000. Before that, its voting was more balanced. As of the 2020 census , there were 4,535 people living in the county. As of the 2010 census , there were 4,223 people, 1,911 households, and 1,229 families in the county. The population density

272-545: Is the first exit in Silver Bow County on I-90, as the highway starts to turn back toward the east. Ramsay is located in the southwest corner of the interchange where I-15 becomes concurrent with I-90 through Butte . On the western edge of Butte, I-115 continues east into town, as I-15/I-90 turns southeast, bypassing most of downtown Butte. An interchange with MT 2 serves Bert Mooney Airport before I-15/I-90 split just east of Butte, with I-15 continuing north over

306-628: The Continental Divide over the 6,368-foot (1,941 m) high Elk Park Pass , which straddles the Silver Bow– Jefferson county border. I-90 heads south then east, also entering Jefferson County, passing over the divide at Homestake Pass which is 6,375-foot (1,943 m) high. After traveling the pass, an emergency escape ramp can be found on the highway's eastbound lanes. Jefferson County has interchanges with S-399 east of Pipestone, Montana and S-359 east of Cardwell before meeting

340-537: The Crow Indian Reservation and intersects S-384 , before reaching Crow Agency . Crow Agency is home to Little Bighorn Battlefield National Monument and Reno–Benteen Battlefield Memorial, which are passed after US 212 departs to the east. Continuing south, I-90/US 87 parallels S-451 and the Little Bighorn River , passing by Garryowen , Benteen , Lodge Grass , and Wyola before exiting

374-516: The Garnet Range on the west slope of the Rocky Mountains . The highway passes north of Lolo National Forest while headed easterly. The highway continues through northern Granite county, intersecting MT 1 before exiting the county entering Powell County . I-90 intersects S-272 13 miles (21 km) after entering the county, which clips the eastern segment of Lolo National Forest, before

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408-554: The census-designated place (CDP) of De Borgia , continuing southeasterly, intersecting several minor roads, before reaching the CDP of St. Regis and Montana Highway 135 (MT 135). The highway stops paralleling the St. Regis River, and begins to parallel, and cross over several times, the Clark Fork River . Superior , the county seat , is intersected before the highway turns south through

442-480: The concurrent highways US Highway 93 (US 93) and MT 200 , which join I-90 from the west. The three highways continue into the county seat of Missoula , where, at the first exit, US 93 leaves on the western border of Missoula and travels through Orchard Homes . The next two exits travel into Downtown Missoula , while the last exit serves East Missoula . US 12 joins I-90 and MT 200 exits to

476-403: The 1,911 households, 21.9% had children under the age of 18 living with them, 52.4% were married couples living together, 7.3% had a female householder with no husband present, 35.7% were non-families, and 29.7% of all households were made up of individuals. The average household size was 2.20 and the average family size was 2.69. The median age was 49.8 years. The median income for a household in

510-523: The Greycliff rest area, located 380.9 miles (613.0 km) from the Idaho border. The highway passes through the Sweet Grass– Stillwater county border just west of Reed Point . After passing into Stillwater County, I-90 crosses over the river, and enters the county seat of Columbus , intersecting MT 78 south of the highway and S-306 on the north side of the highway. The highway is titled

544-608: The I-90/US ;212 concurrency. On the extreme eastern end of Billings, the three highways intersect the western terminus of I-94 , which heads northeast toward North Dakota , while I-90 turns southeast into Big Horn County . Immediately after entering Big Horn County, the three highways pass the seasonal Hardin rest area. Entering Hardin , the county seat, the three highways intersect S-313 and MT 47 . S-313 provides access to Yellowtail Dam , while MT 47 connects back to I-94. After exiting Hardin, I-90 turns south, entering

578-752: The Jefferson– Broadwater county border. There is only one exit along I-90 in Broadwater County, linking MT 2 in the south and US 287 north of the highway before crossing the Broadwater– Gallatin county border at the Missouri River . I-90 parallels S-205 , bypassing the towns of Trident , Logan , Manhattan , and Belgrade on the north of the highway. A new interchange was constructed just east of Belgrade (exit 299) that services Bozeman Yellowstone International Airport to

612-500: The Quartz Flats rest area, located 58.2 miles (93.7 km) from the Idaho border. After leaving the rest area, the highway straightens out, heading easterly. The highway continues east before exiting the county, just south of Alberton . Entering Missoula County , the highway intersects Alberton , before continuing easterly through Huson and Secondary Highway 263 (S-263). The highway continues southeast before intersecting

646-633: The Robert E. Ewing Jr. Memorial Highway between mileposts 410 and 424. I-90 intersects the Columbus rest area, 418.8 miles (674.0 km) from the Idaho border, followed by Park City before exiting Stillwater County. US 212 becomes concurrent with I-90 just east of Laurel before entering the county seat of Billings . I-90 Business (I-90 Bus.) passes into town as the main freeway travels south of Billings and bisects Billings Heights and Lockwood intersecting MT 3 and US 87 , which joins

680-534: The bridges, interchanges and on/offramps along the corridor at an estimated cost of $ 114 million. Mineral County, Montana Mineral County is a county located in the U.S. state of Montana . As of the 2020 census , the population was 4,535. Its county seat is Superior . According to the United States Census Bureau , the county has a total area of 1,223 square miles (3,170 km ), of which 1,219 square miles (3,160 km )

714-536: The county seat of Livingston and passes over the Yellowstone River . The highway continues northeasterly, paralleling the river, intersecting S-295 before crossing the Park– Sweet Grass county border. Still paralleling the Yellowstone River, I-90 travels northwest intersecting S-298 and US 191 in the county seat of Big Timber . The highway turns back southeast, passing south of Greycliff and

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748-461: The daytime and nighttime speed limits on Interstate Highways are 80 mph (130 km/h) for cars and light trucks and 65 mph (105 km/h) for heavy trucks, except within urban areas, where the maximum speed limit is 65 mph (105 km/h) for all vehicles, day or night. The western 34 miles (55 km) have a lower speed limit, as well as the Missoula and Butte urban areas. In 1996,

782-430: 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. I-15 and US 287 continue along Little Prickly Pear Creek before passing through

816-518: The north and the western area of the city of Bozeman. MT 85 travels south from I-90 in Belgrade, providing access to Bozeman Hot Springs . The highway then enters the city of Bozeman , the county seat, and intersects and becomes concurrent with US 191 . I-90 exits the county at the Gallatin– Park county border at 5,760-foot (1,760 m) high Bozeman Pass . US 89 intersects I-90 in

850-672: The north of the highway outside of Missoula, paralleling the Blackfoot River as I-90 continues east, following and then intersecting S-210 in Clinton . The Bearmouth rest area, 142.8 miles (229.8 km) from the Idaho border, is intersected before crossing the Missoula– Granite county border. After entering Granite County, I-90 has an interchange with an access road to the Garnet Back Country Byway , providing access to

884-585: The northern tip of Deer Lodge County, in a southwesterly direction. Galen and S-273 are intersected, before the highway passes west of the Warm Springs State Wildlife Management Area. After passing the wildlife management area, the highway passes by Warm Springs and MT 48 . Just northwest of the Deer Lodge– Silver Bow county border, I-90 intersects MT 1. Fairmont Hot Springs Resort , accessible via S-441 ,

918-405: The seasonal Gold Creek rest area is intersected. Garrison is northeast of the highway as US 12 ends its concurrency, traveling north from I-90 toward the state capital of Helena . I-90 turns south, paralleling former Northern Pacific Railway trackage, before intersecting S-275 and the county seat, Deer Lodge . Continuing south, I-90 exits Powell County at Racetrack . I-90 bisects

952-537: The state of Montana is 552.54 miles (889.23 km) in length, passing through 14 counties in central and southern Montana. It is the longest segment of I-90 within a single state. I-90 enters Montana and Mineral County from Shoshone County , Idaho over the 4,725-foot (1,440 m) high Lookout Pass , which traverses the Coeur d'Alene Mountains of the Bitterroot Range , and immediately has its first interchange ,

986-596: The state of Montana and entering Sheridan County , Wyoming. I-90 replaced US 10 between Livingston and the Idaho border, and, before that, the Yellowstone Trail . Some sections of the highway follow the historic Mullan Road , a military road constructed from 1859 to 1862 between Fort Walla Walla in modern-day Washington and Fort Benton in Montana. The section over Homestake Pass cost $ 18.5 million (equivalent to $ 133 million in 2023 ) to construct and

1020-590: The town of Dillon , I-15 passes near Clark's Lookout State Park before beginning to parallel the Big Hole River . The freeway then turns away from the river, continuing northeast along Divide Creek through the desert, before splitting away from the creek and heading north. I-15 eventually merges into I-90 at a trumpet interchange . I-15 and I-90 run concurrently through the city of Butte , coming first to an interchange with I-115 , signed as Business Loop 15 and Business Loop 90. I-15 and I-90 pass through

1054-427: The town of Wolf Creek after several miles. Northeast of there, US 287 continues north, while I-15 runs close to the Missouri River . The freeway provides access to Cascade and then continues through the plains through Ulm before turning northeast into the city of Great Falls . 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

Interstate 15 in Montana - Misplaced Pages Continue

1088-522: Was 3.5 inhabitants per square mile (1.4 inhabitants/km ). There were 2,446 housing units at an average density of 2.0 units per square mile (0.77 units/km ). The racial makeup of the county was 94.9% white, 1.5% American Indian, 0.7% Asian, 0.3% black or African American, 0.2% from other races, and 2.4% from two or more races. Those of Hispanic or Latino origin made up 1.9% of the population. In terms of ancestry, 30.9% were German , 16.9% were Irish , 15.4% were English , and 3.0% were American . Of

1122-501: Was completed on October 30, 1966. The final two-lane section of the highway, near Springdale , was expanded to four lanes in May 1987. Until 1995 in Montana near the Idaho border, I-90 was not a divided highway for a few stretches, having only a narrow paved median . From 1995 until 1999, the daytime maximum speed limit in Montana was "reasonable and prudent". As of October 1, 2015 ,

1156-539: Was renamed the "First Special Service Force Memorial Highway". 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. Interstate 90 in Montana Interstate ;90 ( I-90 ) is an east–west transcontinental Interstate Highway across the northern United States , linking Seattle to Boston . The portion in

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