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List of state highways in Montana

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Montana Highway System
Montana Highway 3 marker
Montana Highway 59 marker
Montana Highway 200 marker
Highway markers for MT 3, MT 59, and MT 200
Map of main highways within Montana
System information
Maintained by MDT
Formed1942[1]
Highway names
InterstatesInterstate nn (I-nn)
US HighwaysU.S. Highway n (US n)
StateMontana Highway n (MT n)
SecondarySecondary Highway nnn (S-nnnn)
System links

The state highways in Montana are the state highways owned and maintained by the Montana Department of Transportation (MDT) in the US state of Montana.

Montana's state highways are classified as either primary or secondary.[1] Several of Montana's state highways (both primary and secondary), or sections thereof, have also been designated as part of the National Highway System.[1]

Primary state highways

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The square markers used today to identify primary Montana highways are only slightly different from their 1940s and earlier predecessors. The old markers used the word "ROUTE" above the number in big size, the route number in the middle, and the word "MONTANA" from edge-to-edge at the sign bottom.[1] The font used was similar to that used for US routes.

Number Length (mi)[2][3] Length (km) Southern or western terminus Northern or eastern terminus Formed Removed Notes
MT 1 — — US 191 near Grayling US 10 near Sappington — — Replaced by MT 287 (now US 287)
MT 1 63.652 102.438 I-90 in Opportunity I-90 in Drummond 01922-01-011922 current
MT 2 63.241 101.777 I-90 in Butte I-90 in Three Forks — —
MT 3 — — Idaho border near Heron US 93 in Ravalli — — Replaced by US 10 Alt
MT 3 221.770 356.904 I-90 in Billings I-15 and US 89 in Great Falls — —
MT 4 24 39 Idaho state line MT 3 in Thompson Falls — — decommissioned when Idaho truncated SH 4 at Burke; Replaced by Forest Service Road NF-7623 (connects to Burke) and S-471
MT 5 65.573 105.530 MT 13 in Scobey ND 5 in Westby — —
MT 6 — — US 10 Alternate in Townsend US 10 in Forsyth — — Replaced by US 12
MT 7 80.585 129.689 S-323 in Ekalaka I-94 in Wibaux 01930-01-011930 current
MT 8 — — US 87 in Crow Agency MT 22 near Olive — — Replaced by US 212
MT 9 — — Lolo Pass US 93 at Lolo — — Replaced by S-412 (now US 12)
MT 11 — — US 89 in Vaughn Alberta border at Sweetgrass — 01932-01-011932 Replaced by US 91
MT 11 — — — — — —
MT 13 112.507 181.062 MT 200 in Circle Hwy 36 at the Saskatchewan border — —
MT 13W 5.797 9.329 US 2 in Wolf Point MT 13 in Bridge Park — 01994-01-011994 Replaced by MT 25
MT 14 — — US 10 at Glendive North Dakota border at Fairview — — Replaced by MT 16 and MT 23N (later MT 20; now MT 200)
MT 15 — — US 87 in Stanford US 2 in Chester — — Replaced by S-230 (now MT 80) and S-223
MT 16 152.371 245.217 I-94 Bus. in Glendive Hwy 6 at the Saskatchewan border — —
MT 17 — — — — — — location unknown
MT 17 14.082 22.663 US 89 near Kennedy Creek Hwy 6 at the Alberta border — —
MT 18 — — US 87 in Grass Range US 10/MT 14 in Glendive — — Replaced by MT 20 (now MT 200) and MT 20S (now MT 200S)
MT 19 — — US 10 in Big Timber US 2/MT 39 in Malta — — Replaced by US 191
MT 19 21.482 34.572 US 87 and MT 200 near Grass Range US 191 near Roy — —
MT 20 — — US 10 in Bonner US 89 near Great Falls — — Replaced by MT 200
MT 21 — — US 10 in Columbus MT 6 at Ryegate — — Replaced by S-300 and S-306
MT 21 20.776 33.436 US 287 near Augusta MT 200 in Simms — —
MT 22 — — Wyoming border at Alzada Saskatchewan border at Port of Ophiem — — Replaced by US 212, MT 59, S-341, and MT 24
MT 23 7.527 12.114 MT 16 and MT 200 near Sidney ND 68 at the North Dakota border — — From 1951 to 1958, continued west to Circle
MT 23N — — — North Dakota border at Fairview — — Replaced by MT 20 (now MT 200)
MT 23S — — — ND 68 at the North Dakota border — — Replaced by MT 23
MT 24 58 93 MT 37 at Jennings US 2 in Marion — —
MT 24 134.098 215.810 MT 200 near Brockway Hwy 2 at the Saskatchewan border — —
MT 24W 2.892 4.654 MT 24 south of Glasgow US 2 in Glasgow — 01994-01-011994 Replaced by MT 42
MT 25 — — US 87 in Billings US 87 in Lewistown — —
MT 25 5.797 9.329 US 2 in Wolf Point MT 13 in Bridge Park 01994-01-011994 current
MT 26 — — MT 3 in Trout Creek US 2 in Kootenai National Forest — —
MT 27 — — MT 19 in Winifred MT 29 in Big Sandy — — Replaced by S-226
MT 28 46.734 75.211 MT 200 near Plains US 93 in Elmo 01924-01-011924 current
MT 29 — — US 87/US 89 in Great Falls Port of Wildhorse — — Replaced by US 87
MT 30 — — US 12 near Miles City South Dakota border near Mill Iron — —
MT 31 — — US 10 in Drummond MT 35 near Bigfork — — Replaced by S-271 and MT 83
MT 32 — — Yellowstone National Park at Silver Gate US 310 at Rockvale — — Replaced by US 212
MT 33 — — US 91/MT 20 in Wolf Creek US 89 in Choteau — — Replaced by US 287
MT 34 — — MT 41 in Twin Bridges MT 287 in Ennis — — Replaced by rerouted MT 287
MT 35 50.669 81.544 US 93 in Polson US 2 in Evergreen — —
MT 36 — — US 93 near Gibbons Pass US 91 in Dillon — — Replaced by MT 43 and S-278
MT 37 67.048 107.903 US 2 in Libby US 93 in Eureka — —
MT 38 53.835 86.639 US 93 in Grantsdale MT 1 in Porters Corner 01924-01-011924 current Skalkaho Highway
MT 39 — — Port of Morgan at the Saskatchewan border Hysham — — Replaced by MT 19 (later S-242) and S-245
MT 39 51.163 82.339 US 212 in Lame Deer North of I-94 near Forsyth 01977-01-011977 current
MT 40 4.505 7.250 US 93 south of Whitefish US 2 west of Columbia Falls — —
MT 41 54.512 87.729 I-15 Bus. in Dillon MT 2 in Vendome Station — —
MT 42 — — — — — — location unknown
MT 42 2.892 4.654 MT 24 south of Glasgow US 2 in Glasgow 01994-01-011994 current
MT 43 77.462 124.663 US 93 at Lost Trail Pass I-15 near Divide — — Last mile near western terminus with US 93 is in Idaho.
MT 44 — — — — — — location unknown
MT 44 28.390 45.689 US 93 north of Dupuyer I-15 east of Valier — —
MT 45 — — MT 8 in Lame Deer US 10 in Forsyth — — Replaced by S-315 (now MT 39)
MT 46 — — — — — — location unknown
MT 47 31.437 50.593 I-90 in Hardin I-94 east of Custer — —
MT 48 6.839 11.006 MT 1 near Anaconda I-90 near Warm Springs — —
MT 49 — — — — — — location unknown
MT 49 11.734 18.884 US 2 in East Glacier Park US 89 north of Kiowa — —
MT 50 — — MT 13 southeast of Wolf Point US 2 east of Wolf Point — — Replaced by MT 13
MT 50 — — Idaho border at Raynolds Pass US 287 west of Hebgen Lake — — Replaced by MT 87
MT 55 12.996 20.915 MT 41 north of Silver Star I-90 at Whitehall — —
MT 56 34.646 55.757 MT 200 west of Noxon US 2 east of Troy 01977-01-011977 current
MT 59 195.389 314.448 WYO 59 at the Wyoming border MT 200 at Jordan — —
MT 64 9.039 14.547 Big Sky Resort US 191 near Big Sky Resort — —
MT 66 50.022 80.503 US 191 south of Landusky US 2 at Fort Belknap — —
MT 67 1.755 2.824 US 2 in Shelby I-15 in Shelby — —
MT 68 1.494 2.404 I-15 south of Cascade I-15 north of Cascade — —
MT 69 38.395 61.791 MT 55 at Whitehall I-15 at Boulder — —
MT 72 21.408 34.453 WYO 120 at the Wyoming border US 310 south of Bridger 01977-01-011977 current
MT 77 1.991 3.204 Hot Springs MT 28 east of Hot Springs 01977-01-011977 current
MT 78 47.714 76.788 US 212 at Red Lodge I-90 at Columbus 01977-01-011977 current
MT 80 67.172 108.103 US 87 at Stanford US 87 at Fort Benton — —
MT 81 42.446 68.310 MT 80 near Coffee Creek US 191 at Brooks — —
MT 82 6.862 11.043 US 93 north of Somers MT 35 north of Bigfork 01977-01-011977 current
MT 83 91.118 146.640 MT 200 at Clearwater Junction MT 35 north of Bigfork 01977-01-011977 current
MT 84 28.904 46.516 US 287 in Norris US 191/MT 85 near Four Corners — —
MT 85 6.704 10.789 US 191/MT 84 near Four Corners I-90 at Belgrade — —
MT 86 37.498 60.347 US 191/I-90 Bus. in Bozeman US 89 near Wilsall — —
MT 87 8.571 13.794 SH 87 at the Idaho border US 287 west of Quake Lake 01987-01-011987 current
MT 110 — — US 10 near Opportunity US 10 in Drummond — — Replaced by US 10 Alternate
MT 117 13.138 21.144 MT 24 at Fort Peck US 2 at Nashua — —
MT 135 21.549 34.680 I-90 at St. Regis MT 200 near Paradise 01977-01-011977 current
MT 141 32.468 52.252 US 12 at Avon MT 200 north of Helmville 01977-01-011977 current
MT 187 — — US 10 in Bozeman US 89 in Wilsall — — Replaced by S-293 (now MT 86)
MT 191 — — US 191 near Grayling US 10 near Sappington — — Replaced by MT 1 (later MT 287, now US 287)
MT 200 706.624 1,137.201 SH 200 at the Idaho border east of Cabinet, Idaho ND 200 at Fairview 01967-01-011967 current Longest state highway in Montana
MT 287 48.822 78.571 MT 41 at Twin Bridges US 287 at Ennis — —
MT 789 — — Wyoming border south of Warren Alberta border at Sweetgrass — — Part of US 789 corridor

Special routes

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Number Length (mi) Length (km) Southern or western terminus Northern or eastern terminus Formed Removed Notes
MT 20S — — MT 20 east of Circle US 10/I-94 Bus. in Glendive — — Replaced by MT 200S
MT 200S 48.674 78.333 MT 200 east of Circle I-94 Bus. in Glendive 01967-01-011967 current
MT 287A 46 74 MT 287 at Ennis I-90/US 10 near Three Forks 01961-01-011961 01965-01-011965 Former section of MT 287; replaced by US 287
  •       Former

Secondary state highways

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Main article: List of secondary highways in Montana
S-486 at Columbia Falls, August 2013

Montana's secondary system was established in 1942,[4] but secondary highways (S routes) were not signed until the 1960s.[1] S route designations first appeared on the state highway map in 1960[5] and are abbreviated as "S-nnn". Route numbers 201 and higher are, with very few exceptions, exclusively reserved for S routes. Notable exceptions include, MT 287, and the former MT 789.

The highway markers for Montana's Secondary Highways are distinctive in that the route number appears in black on a white down-pointing arrowhead.[1] (Early markers were white numbers on black arrowheads with the word Montana in the flat top of the inverted arrowhead and Secondary appearing below the route number on the shields.)

See also

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References

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  1. ^ a b c d e f Multimodal Planning Bureau, Rail, Transit & Planning Division (March 2017). "A Guide to Functional Classification, Highway Systems and Other Route Designations in Montana" (PDF). Montana Department of Transportation. pp. 5–6. Retrieved April 8, 2019.
  2. ^ Montana Department of Transportation (January 19, 2022). "ALTIS Road Log Report" (PDF). Helena: Montana Department of Transportation. Retrieved March 6, 2017.
  3. ^ "Montana Off System Routes" (GIS data). Montana Department of Transportation. Retrieved April 8, 2017.
  4. ^ "Federal-Aid Road Log" (PDF). Montana Highway Department Highway Planning Survey. Montana Highway Department. January 1, 1943. Retrieved April 7, 2019 – via Internet Archive.
  5. ^ Montana State Highway Commission (1960). State Highway Map (PDF) (Map). Helena: Montana State Highway Commission. Retrieved April 8, 2018.[full citation needed]
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