List of U.S. Highways in Montana

The U.S. Highways in Montana are the segments of the United States Numbered Highway System owned and maintained by the Montana Department of Transportation (MDT) in the U.S. state of Montana.

U.S. Highways of the Montana Highway System

U.S. Highway 2 marker

U.S. Highway 12 marker

U.S. Highway 191 marker

Highway markers for U.S. Highway 2, 12, and 191
Map of main highways (Interstate and U.S.)
System information
Maintained by MDT
Highway names
InterstatesInterstate n (I-n)
US HighwaysU.S. Highway n (US n)
StateMontana Highway n (MT n)
Secondary:Secondary Highway n (S-n)
System links

Mainline highways

Number Length (mi) Length (km) Southern or western terminus Northern or eastern terminus Formed Removed Notes
US 2 6671,073 US 2 west of TroyUS 2 east of Bainville 01926-01-011926current
US 10 7001,100 US 10 near Mullan, IDUS 10 near Beach, ND 01926-01-01192601986-01-011986 Mostly replaced by I-90 and I-94
US 10N 112180 Three ForksGarrison 01930-01-01193001959-01-011959 Replaced by MT 287 and US 12
US 10S 115185 Three ForksGarrison 01930-01-01193001959-01-011959 Became mainline US 10
US 12 597961 US 12 near Lolo Hot SpringsUS 12 near Marmarth, ND 01926-01-011926current
US 20 1016 US 20 near West YellowstoneYellowstone National Park entrance at West Yellowstone 01940-01-011940current
US 87 440710 I-90/US 87 near Ranchester, WYUS 2 at Havre 01926-01-011926current
US 87E 311501 ArmingtonUS 87E near Ranchester 01926-01-01192601934-01-011934 Became mainline US 87
US 87W 209336 ArmingtonYellowstone National Park near Gardiner 01926-01-01192601934-01-011934 Replaced by US 89
US 89 404650 Yellowstone National Park near GardinerHwy 2 near Carway, AB 01934-01-011934current
US 91 396637 US 91 near MonidaHwy 4 at Sweetgrass 01926-01-01192601980-01-011980 Replaced by I-15
US 93 286460 US 93 at Lost Trail PassBC 93 at Roosville, BC 01926-01-011926current
US 191 438705 Yellowstone National Park at West YellowstoneHwy 4 north of Loring 01926-01-011926current
US 212 322518 Yellowstone National Park at northeast entrance
US 212 south of Red Lodge
US 212 near Cooke City
US 212 near Alzada
01939-01-011939current
US 287 282454 Yellowstone National Park entrance at West YellowstoneUS 89 at Choteau 01965-01-011965current
US 310 5589 US 310/WYO 789 near Frannie, WYI-90 Bus. at Laurel 01926-01-011926current
US 312 225362 US 12 in BillingsUS 212 at Broadus 01959-01-01195901981-01-011981 Replaced by MT 59 and US 10
US 789 Wyoming state line near FrannieCanadian Border near Sweetgrass Proposed, but never commissioned; would have followed (south to north) US 310, US 10/US 212, US 87, US 91
  •       Former

Special routes

Number Length (mi) Length (km) Southern or western terminus Northern or eastern terminus Formed Removed Notes
US 10A 142229 De SmetUS 10A near Heron 01941-01-01194101967-01-011967 Replaced by MT 200
US 10A 62100 OpportunityDrummond 01936-01-01193601986-01-011986 Replaced by MT 1

US 10 Byp.
Served Butte

US 10S Byp.
Served Butte

US 10 Byp.
Served Billings

US 12 Bus.
Serves Missoula

US 10 Bus.
Serves Helena

US 10 Byp.
Served Helena

Temp. US 10
Served Fallon and Ismay

US 87 Bus.
Serves Great Falls

US 89 Byp.
Served Great Falls

US 91 Byp.
Served Butte

US 91 Byp.
Served Helena

US 93 Alt.
4.57.2 US 93 south of KalispellUS 93 north of Kalispell 02010-01-012010current Included all segments open as of November 2013; expected completion in 2016[1][2]

US 191 Bus.
02023-10-262023 Served Lewistown

US 212 Byp.
Served Billings
  •       Former

See also

References

  1. Montana Department of Transportation (2013). "Montana Road Log" (PDF). p. 117. Retrieved 2015-02-08.
  2. "Kalispell Bypass". Montana Department of Transportation. Retrieved 2015-02-08.
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