List of Montana numbered highways

Montana Highway System
Highway markers for Interstate 90, U.S. Highway 2, MT 200, and S-236
Map of main highways (Interstate and U.S.)
System information
Maintained by MDT
Highway names
Interstates:	Interstate n (I-n)
US Routes:	U.S. Highway n (US n)
State:	Montana Highway n (MT n)
Secondary:	Secondary Highway n (S-n)
System links
Montana Highways Secondary

The following is a list of Montana's numbered highways.

Interstate highways

Number	Length (mi)^[1]	Length (km)	Southern or western terminus	Northern or eastern terminus	Formed	Removed
I0015 !I‑15	396.03	637.35	I-15 near Monida	Hwy 4 at Sweetgrass	—	—
I0090 !I‑90	551.68	887.84	I-90 near Mullan, ID	I-90 / US 87 near Ranchester, WY	—	—
I0094 !I‑94	249.15	400.97	I-90 at Billings	I-94 near Beach, ND	—	—
I0115 !I‑115	1.19	1.92	I-15 / I-90 in Butte	Downtown Butte	—	—
I0315 !I‑315	0.83	1.34	I-15 / US 89 / MT 200 in Great Falls	Downtown Great Falls	—	—

U.S. highways

Number	Length (mi)	Length (km)	Southern or western terminus	Northern or eastern terminus	Formed	Removed	Notes
US0002 !US 2	667	1,073	US 2 west of Troy	US 2 east of Bainville	1926	current
US0010 !US 10	700	1,100	US 10 near Mullan, ID	US 10 near Beach, ND	1926	1986	Mostly replaced by I-90 and I-94
US0010A !US 10A	62	100	Gregson	Drummond	1936	1986	Replaced by MT 1
US 19610010A !US 10A	142	229	De Smet	US 10A near Heron	1941	1967	Replaced by MT 200
US 19260010N !US 10N	112	180	Three Forks	Garrison	1930	1959	Replaced by MT 287 and US 12
US 19260010S !US 10S	115	185	Three Forks	Garrison	1930	1959	Became mainline US 10
US0012 !US 12	597	961	US 12 near Lolo Hot Springs	US 12 near Marmarth, ND	1926	current
US0020 !US 20	10	20	US 20 near West Yellowstone	Yellowstone National Park entrance at West Yellowstone	1940	current
US0087 !US 87	440	710	I-90 / US 87 near Ranchester, WY	US 2 at Havre	1926	current
US 19260087E !US 87E	311	501	Armington	US 87E near Ranchester	1926	1934	Became mainline US 87
US 19260087W !US 87W	209	336	Armington	Yellowstone National Park near Gardiner	1926	1934	Replaced by US 89
US0089 !US 89	404	650	Yellowstone National Park near Gardiner	Hwy 2 near Carway, AB	1934	current
US0091 !US 91	396	637	US 91 near Monida	Hwy 4 at Sweetgrass	1926	1980	Replaced by I-15
US0093 !US 93	286	460	US 93 at Lost Trail Pass	BC 93 at Roosville, BC	1926	current
US-Alt0093 !US 93 Alt.	4.5	7.2	US 93 south of Kalispell	US 93 north of Kalispell	2010	current	Included all segments open as of November 2013; expected completion 2016^[2]^[3]
US0191 !US 191	438	705	Yellowstone National Park at West Yellowstone	Hwy 4 north of Loring	1926	current
US0212 !US 212	322	518	Yellowstone National Park at Northeast entrance US 212 south of Red Lodge	US 212 near Cooke City US 212 near Alzada	1939	current
US0287 !US 287	282	454	Yellowstone National Park entrance at West Yellowstone	US 89 at Choteau	1965	current
US0310 !US 310	55	89	US 310 / WYO 789 near Frannie, WY	I-90 Bus at Laurel	1926	current
US0312 !US 312	225	362	US 12 in Billings	US 212 at Broadus	1959	1981	Replaced by MT 59 and US 10

Primary state highways

Montana Highway 1 - Opportunity to Drummond
Montana Highway 2 - Three Forks to Butte
Montana Highway 3 - Billings to Great Falls
Montana Highway 5 - Scobey to North Dakota state line near Westby
Montana Highway 7 - Ekalaka to Wibaux
Montana Highway 10 - Billings
Montana Highway 13 - Circle to Port of Scobey at the Saskatchewan border
Montana Highway 16 - Glendive to the Saskatchewan border at Regway
Montana Highway 17 - Jct U.S. Route 89 near Kennedy Creek to Port of Chief Mountain at the Alberta border
Montana Highway 19 - Roy to Grass Range
Montana Highway 21 - Augusta to Simms
Montana Highway 23 - Sidney to North Dakota border
Montana Highway 24 - Jct of MT 200 to Saskatchewan border at Port of Opheim
Montana Highway 25 - Wolf Point to Bridge Park
Montana Highway 28 - Plains to Elmo
Montana Highway 35 - Polson to Evergreen
Montana Highway 37 - Libby to Eureka
Montana Highway 38 - Grantsdale to Porter's Corners
Montana Highway 39 - Forsyth to Lame Deer
Montana Highway 40 - Whitefish to Columbia Falls
Montana Highway 41 - Dillon to Vendome Station
Montana Highway 42 - Jct of MT 24 to Glasgow
Montana Highway 43 - Lost Trail Pass to Divide
Montana Highway 44 - U.S. Route 89 about 10 miles (16 km) north of Dupuyer to Interstate 15 at Exit 348
Montana Highway 47 - Custer to Hardin
Montana Highway 48 - Mill Creek to Warm Springs
Montana Highway 49 - East Glacier Park to Jct U.S. Route 89 north of Kiowa
Montana Highway 55 - Jct of MT 41 near Parsons Bridge to Whitehall
Montana Highway 56 - Troy to Jct of MT 200 near Noxon
Montana Highway 59 - Wyoming border south of Biddle to Jordan
Montana Highway 64 - Jct U.S. Route 191 to Big Sky
Montana Highway 66 - Fort Belknap Agency to U.S. Route 191
Montana Highway 69 - Whitehall to Boulder
Montana Highway 72 - Wyoming border south of Belfry to Bridger
Montana Highway 78 - Red Lodge to Columbus
Montana Highway 80 - Fort Benton to Stanford
Montana Highway 81 - Coffee Creek to Brooks
Montana Highway 82 - Bigfork to Somers
Montana Highway 83 - Clearwater Crossing to Bigfork
Montana Highway 84 - Bozeman Hot Springs to Norris
Montana Highway 85 - Bozeman Hot Springs to Belgrade
Montana Highway 86 - Bozeman to Wilsall
Montana Highway 87 - Idaho border at Raynolds Pass to Jct U.S. Route 287 near Cliff Lake
Montana Highway 89 - Dillon along Interstate 15
Montana Highway 117 - Nashua to Fort Peck
Montana Highway 135 - St. Regis to Jct of MT 200 near Paradise
Montana Highway 141 - Avon to Mineral Hill
Montana Highway 200 - Heron to Fairview
Montana Highway 200 S - Jct of MT 200 near Circle to Jct of Business Route 94/U.S. Route 10 near Glendive
Montana Highway 287 - Twin Bridges to Ennis

Secondary state highways

Montana Secondary Highway 486 at Columbia Falls

Number	Length (mi)	Length (km)	Southern or western terminus	Northern or eastern terminus	Formed	Removed
Sec0201 !S-201	69.511	111.867	MT 13 near Vida	MT 200 in Fairview	1952	current
Sec0202 !S-202	2.662	4.284	MT 23 near Sidney	North Dakota state line	1977	current
Sec0203 !S-203	11.983	19.285	S-269 north of Stevensville	US 93 in Florence	1976	current
Sec0204 !S-204	1.596	2.569	Milk River crossing	US 2 at Dodson	1993	current
Sec0205 !S-205	24.361	39.205	I-90 at Three Forks	S-411 near Bozeman	1993	current
Sec0206 !S-206	9.741	15.677	MT 35 east of Evergreen	US 2 near Columbia Falls	1926	current
Sec0207 !S-207	21.862	35.183	US 87 / MT 3 / MT 200 near Moccasin	MT 81 in Denton	1993	current
Sec0208 !S-208	9.412	15.147	US 191 in Phillips County	Whitewater	1978	current
Sec0209 !S-209	4.861	7.823	MT 35 at Bigfork	MT 83 near Ferndale	1945	current
Sec0210 !S-210	9.855	15.860	MT 200 at Missoula	I-90 / US 12 at Clinton	1976	current
Sec0211 !S-211	9.757	15.702	Lake County	US 93 in Ronan	1945	current
Sec0212 !S-212	17.285	27.818	MT 200 near Dixon	US 93 near Charlo	1945	current
Sec0213 !S-213	39.513	63.590	US 2 in Cut Bank	Hwy 62 at the Port of Del Bonita	1945	current
Sec0214 !S-214	32.828	52.832	S-213 near Cut Bank	I-15 at Sweet Grass	1945	current
Sec0215 !S-215	21.299	34.277	S-213 near Cut Bank	I-15 near Oilmont	1945	current
Sec0217 !S-217	14.087	22.671	S-343 in Toole County	S-409 at Whitlash	1976	current
Sec0218 !S-218	29.253	47.078	I-15 Bus in Conrad	S-225 in Teton County	1945	current
Sec0219 !S-219	19.818	31.894	US 89 near Pendroy	I-15 Bus near Conrad	1945	current
Sec0220 !S-220	17.940	28.872	S-221 near Choteau	S-219 east of Pendroy	1945	current
Sec0221 !S-221	24.444	39.339	US 89 at Choteau	I-15 near Dutton	1945	current
Sec0222 !S-222	3.589	5.776	I-15 / S-278 south of Dillon	I-15 Bus at Dillon	1976	current
Sec0223 !S-223	52.901	85.136	US 87 / MT 80 near Fort Benton	US 2 in Chester	1945	current
Sec0224 !S-224	18.950	30.497	US 2 near Joplin	Local road in Liberty County	1945	current
Sec0225 !S-225	56.220	90.477	Great Falls city limits	S-366 in Toole County	1945	current
Sec0226 !S-226	14.560	23.432	Eden	Great Falls city limits	1945	current
Sec0227 !S-227	16.756	26.966	S-226 near Eden	US 87 / US 89 / MT 3 / MT 200 near Great Falls	1945	current
Sec0228 !S-228	42.633	68.611	US 87 / US 89 / MT 3 / MT 200 near Great Falls	MT 80 near Fort Benton	1945	current
Sec0229 !S-229	2.592	4.171	Helena city limits	S-279 near Helena	1976	current
Sec0231 !S-231	5.674	9.131	Helena city limits	S-279 near Helena	1983	current
Sec0232 !S-232	42.784	68.854	Havre city limits	Hwy 41 at the Port of Wild Horse	1945	current
Sec0233 !S-233	30.482	49.056	S-232 near Havre	Hwy 21 at the Port of Willow Creek	1945	current
Sec0234 !S-234	21.662	34.862	Rocky Boys Indian Reservation	Havre city limits	1945	current
Sec0235 !S-235	5.610	9.028	MT 85 near Bozeman	Bozeman city limits	1983	current
Sec0236 !S-236	88.235	142.000	US 191 at Hilger	US 87 at Big Sandy	1945	current
Sec0238 !S-238	68.888	110.864	US 2 / MT 3 in Ryegate	US 89 / MT 200 in Lewiston	1945	current
Sec0239 !S-239	11.666	18.775	Utica	US 87 / MT 3 / MT 200 in Hobson	1946	current
Sec0240 !S-240	25.333	40.770	Cleveland	US 2 in Chinook	1945	current
Sec0241 !S-241	43.220	69.556	US 2 at Harlem	Hwy 37 at the Port of Turner	1945	current
Sec0243 !S-243	21.185	34.094	US 2 west of Saco	US 2 in Saco	1945	current
Sec0244 !S-244	24.702	39.754	US 87 north of Roundup	MT 200 in Winnett	1945	current
Sec0245 !S-245	37.826	60.875	Local road northwest of Brusett	MT 200 in Jordan	1945	current

Montana Secondary Highway 246 - Glasgow to Hinsdale
Montana Secondary Highway 247 - Webster to Mill Iron (Old 247 ran from Port of Opheim to Glasgow
Montana Secondary Highway 248 - Opheim to Scobey (Old route of Montana Highway 5)
Montana Secondary Highway 249 - Jct Montana Highway 287 to Jct U.S. Route 287 near Cameron (Old Montana Secondary Highway 249 ran from Nashua to Fort Peck in 1960's, now Montana Highway 117)
Montana Secondary Highway 250 - Wolf Point to Volt
Montana Secondary Highway 251 - Flaxville to Jct U.S. Route 2 near Poplar
Montana Secondary Highway 252 - Circle to Horse Creek
Montana Secondary Highway 253 - Terry to Brockway
Montana Secondary Highway 254 - Glendive to Jct Montana Highway 13 near Vida via Richey
Montana Secondary Highway 255 - Rudyard to xx
Montana Secondary Highway 256 - Plentywood to Port of Raymond
Montana Secondary Highway 257 - Trout Creek to Superior
Montana Secondary Highway 258 - Reserve to North Dakota border
Montana Secondary Highway 259 - White Sulphur Springs to Jct U.S. Route 89 at Newlan Creek
Montana Secondary Highway 261 - Sidney to Wibaux (Old Montana Highway 7)
Montana Secondary Highway 262 - Superior to xx
Montana Secondary Highway 263 - Missoula to Huson
Montana Secondary Highway 264 - Missoula to xx
Montana Secondary Highway 269 - Hamilton to Stevensville
Montana Secondary Highway 271 - Drummond to Helmville
Montana Secondary Highway 272 - Deer Lodge to Goldcreek (Old Montana Secondary Highway 272 connected Helmville to Avon, now Montana Highway 141)
Montana Secondary Highway 273 - Galen to xx
Montana Secondary Highway 274 - Jct Montana Highway 1 near Mill Creek to Jct Montana Highway 43 near Fishtrap
Montana Secondary Highway 275 - Through Deer Lodge
Montana Secondary Highway 276 - Butte to xx
Montana Secondary Highway 277 - Hammond to Jct Montana Secondary Highway 323 near Ridgeway
Montana Secondary Highway 278 - Dillon to Wisdom
Montana Secondary Highway 279 - Helena to Jct Montana Highway 200 near Flecher Pass
Montana Secondary Highway 280 - Helena to Trout Creek Canyon
Montana Secondary Highway 282 - Jack Mountain to Montana City
Montana Secondary Highway 283 - Pony to Harrison
Montana Secondary Highway 284 - Townsend to Canyon Ferry
Montana Secondary Highway 285 - Radersburg to Toston
Montana Secondary Highway 286 - Three Forks to Trident
Montana Secondary Highway 288 - Anceney to Manhattan
Montana Secondary Highway 290 - Manhattan to xx
Montana Secondary Highway 292 - Whitefish Stage Road - MT 40 near Whitefish to S-548 in Evergreen
Montana Secondary Highway 294 - Horse Butte to Jct U.S. Route 12 north of Martinsdale
Montana Secondary Highway 295 - Mission to Livingston
Montana Secondary Highway 296 - Lebo Lake to Two Dot
Montana Secondary Highway 297 - Careless Creek to Judith Gap
Montana Secondary Highway 298 - Big Timber to Boulder Ranger Station
Montana Secondary Highway 300 - Ryegate to Big Coolie Creek
Montana Secondary Highway 302 - Billings to Molt
Montana Secondary Highway 304 - Shepherd to Jct U.S. Route 212
Montana Secondary Highway 305 - Billings to xx
Montana Secondary Highway 306 - Columbus to Rapelje
Montana Secondary Highway 308 - Belfry to Red Lodge (Orig route extended east to Bridger, now part of Montana Highway 72)
Montana Secondary Highway 310 - Custer to Musselshell
Montana Secondary Highway 311 - Hysham to Myers
Montana Secondary Highway 313 - Fort Smith to Hardin
Montana Secondary Highway 314 - Busby to Wyoming border south of Decker (Continues as Wyoming State Highway 338)
Montana Secondary Highway 315 - Lame Deer to near Forsyth
Montana Secondary Highway 317 - Kalispell southeast bypass from US 93 to MT 35
Montana Secondary Highway 318 - Swords Park to Billings Municipal Airport
Montana Secondary Highway 320 - Ismay to Jct U.S. Route 12
Montana Secondary Highway 322 - Baker to Medicine Rocks
Montana Secondary Highway 323 - Ekalaka to Alzada
Montana Secondary Highway 324 - Clark Canyon Dam to Idaho border at Bannock Pass
Montana Secondary Highway 325 - Chinook to North Chinook Reservoir
Montana Secondary Highway 326 - Alzada to Wyoming border south of Alzada (Old Montana Secondary Highway 326 was near Bigfork)
Montana Secondary Highway 327 - Bainville to North Dakota border at Fort Union
Montana Secondary Highway 328 - Jct Montana Secondary Highway 323 to South Dakota border near Capitol (Old Montana Secondary Highway 328 ran from Broadview to xx)
Montana Secondary Highway 330 - Cascade to Ulm
Montana Secondary Highway 331 - Belt to Jct Montana Secondary Highway 228
Montana Secondary Highway 332 - Twelve Mile Dam to Jct Montana Secondary Highway 447 South of Brandenburg
Montana Secondary Highway 334 - Laredo to Beaver Creek Reservoir (Old Montana Secondary Highway 334 ran from Port of Scobey to Scobey (now part of Montana Highway 13)
Montana Secondary Highway 335 - Glendive to Balier Reservoir
Montana Secondary Highway 336 - Rush Hall to Carlyle
Montana Secondary Highway 338 - Hogeland to Jct North of Harlem
Montana Secondary Highway 339 - Wilsall to xx
Montana Secondary Highway 340 - Mildred to Fallon
Montana Secondary Highway 341 - Jordan to Fort Peck Lake
Montana Secondary Highway 342 - Jct U.S. Route 212 to Little Big Horn Battlefield
Montana Secondary Highway 343 - Oilmont to Galata
Montana Secondary Highway 344 - Brockton to Froid
Montana Secondary Highway 345 - Bozeman to Gallatin Gateway
Montana Secondary Highway 346 - Manhattan to Four Corners
Montana Secondary Highway 347 - Belgrade to Amsterdam
Montana Secondary Highway 348 - Gilles to Philipsburg
Montana Secondary Highway 350 - Homestead to Jct Montana Secondary Highway 344
Montana Secondary Highway 352 - Dayton to Lake Mary Ronan
Montana Secondary Highway 353 - Round Butte to Moiese
Montana Secondary Highway 354 - Round Butte to Polson
Montana Secondary Highway 355 - Helena to xx
Montana Secondary Highway 356 - Helena to xx
Montana Secondary Highway 357 - Alder to xx
Montana Secondary Highway 358 - Cut Bank to Valier
Montana Secondary Highway 359 - Harrison to Cardwell
Montana Secondary Highway 360 - Fort Logan to White Sulphur Springs
Montana Secondary Highway 363 - Malta to Dodson
Montana Secondary Highway 364 - Malta to xx
Montana Secondary Highway 365 - Brady to Faris School Road
Montana Secondary Highway 371 - Melville to Twodot
Montana Secondary Highway 374 - Outlook to Jct Montana Highway 5
Montana Secondary Highway 377 - Stevensville to xx
Montana Secondary Highway 379 - Dutton to xx
Montana Secondary Highway 381 - Colding Creek to Jct U.S. Route 12
Montana Secondary Highway 382 - Perma to Markle Pass
Montana Secondary Highway 384 - Hardin to Hysham
Montana Secondary Highway 386 - Fort Benton to xx
Montana Secondary Highway 387 - Fort Benton to Jct U.S. Route 87
Montana Secondary Highway 390 - Missoula to xx
Montana Secondary Highway 391 - Broadus to Wyoming border south of Moorhead
Montana Secondary Highway 393 - Butte to Newcomb
Montana Secondary Highway 396 - Coburg to Harlem (Was U.S. Route 2)
Montana Secondary Highway 399 - Boulder to Whitetail
Montana Secondary Highway 400 - Buffalo to Hobson
Montana Secondary Highway 401 - Molt to Canyon Creek (An old Montana Secondary Highway 401 was replaced by Montana Highway 55)
Montana Secondary Highway 404 - Brockton to xx
Montana Secondary Highway 405 - Froid to Bainville
Montana Secondary Highway 408 - Fairfield to Jct U.S. Route 287
Montana Secondary Highway 409 - Whitlash to Chester
Montana Secondary Highway 411 - Bozeman to Springhill Cemetery
Montana Secondary Highway 412 - Bozeman to xx
Montana Secondary Highway 413 - Jct Montana Highway 7 to Lamesteer
Montana Secondary Highway 416 - Billings to xx
Montana Secondary Highway 417 - Jct U.S. Route 2 to Jct Montana Secondary Highway 366
Montana Secondary Highway 418 - Pryor to xx
Montana Secondary Highway 419 - Limestone to Jct Montana Highway 78 south of Absarokee
Montana Secondary Highway 420 - Absarokee to Nye
Montana Secondary Highway 421 - Columbus to Joliet
Montana Secondary Highway 422 - Parsons Bridge to Silver Star
Montana Secondary Highway 424 - Kalispell to west of Whitefish
Montana Secondary Highway 425 - Roscoe to Fishtail
Montana Secondary Highway 426 - Lewistown to Kolin
Montana Secondary Highway 427 - Raynesford to Jct U.S. Route 89 at Currie Spring
Montana Secondary Highway 428 - Judith Gap to xx
Montana Secondary Highway 429 - Billings to xx
Montana Secondary Highway 430 - Helena to Canyon Creek
Montana Secondary Highway 431 - Fairfield to Power
Montana Secondary Highway 432 - Big Sandy to Rudyard
Montana Secondary Highway 434 - Wolf Creek to Johnson Mountain
Montana Secondary Highway 435 - Augusta to Johnson Mountain
Montana Secondary Highway 437 - Radersburg to Jct U.S. Route 287
Montana Secondary Highway 438 - Glentana to Nashua
Montana Secondary Highway 441 - East of Opportunity off Montana Highway 1
Montana Secondary Highway 444 - Jct Montana Secondary Highway 213 to Jct U.S. Route 2 near Blackfoot
Montana Secondary Highway 446 - Forsyth to Hathaway
Montana Secondary Highway 447 - Rosebud to Ashland
Montana Secondary Highway 448 - Gildford to Box Elder
Montana Secondary Highway 449 - Gildford to Milk River
Montana Secondary Highway 451 - Garryowen to Wyoming border south of Wyola (Was U.S. Route 87)
Montana Secondary Highway 453 - Helena to Lake Helena
Montana Secondary Highway 454 - Helena to Unionville
Montana Secondary Highway 457 - In Wyola from Jct Montana Secondary Highway 451 to Jct Interstate 90 / U.S. Route 87
Montana Secondary Highway 459 - Great Falls to Jct Montana Secondary Highway 226
Montana Secondary Highway 462 - Rock Springs to Jct Montana Highway 200
Montana Secondary Highway 463 - Lodge Grass to Jct near Willow Creek Dam
Montana Secondary Highway 464 - Babb to Browning
Montana Secondary Highway 466 - Trout Hatchery to Jct Montana Secondary Highway 238
Montana Secondary Highway 467 - Circle to Lindsay
Montana Secondary Highway 470 - Bloomfield to Lindsay
Montana Secondary Highway 471 - Thompson Falls to Idaho border
Montana Secondary Highway 472 - Trout Creek to Thompson Falls (Old Montana Highway 200)
Montana Secondary Highway 473 - Conner to Painted Rocks
Montana Secondary Highway 476 - Pray to Montanapolis Springs
Montana Secondary Highway 478 - Big Timber to northwest of Big Timber
Montana Secondary Highway 482 - Libby to xx
Montana Secondary Highway 484 - Fort Howe to Jct U.S. Route 212 near Ashland
Montana Secondary Highway 485 - Trailcreek to Columbia Falls
Montana Secondary Highway 486 - Columbia Falls to Camas Creek entrance of Glacier National Park (and unnumbered to British Columbia border as the North Fork Road)
Montana Secondary Highway 487 - Whitefish to Whitefish Mountain Resort at Big Mountain
Montana Secondary Highway 489 - Miles City to Kinsey
Montana Secondary Highway 493 - Plevna to Baker
Montana Secondary Highway 494 - Plevna to Willard
Montana Secondary Highway 495 - Great Falls to xx
Montana Secondary Highway 496 - Bainville to Jct Montana Highway 16
Montana Secondary Highway 500 - Melstone to Mosby
Montana Secondary Highway 501 - Grantsdale to Sleeping Child Hot Springs
Montana Secondary Highway 503 - Kalispell area loop serving Foys Canyon and Lone Pine State Park
Montana Secondary Highway 504 - Marsh to xx
Montana Secondary Highway 505 - Lewistown to xx
Montana Secondary Highway 507 - Alberton to Huson
Montana Secondary Highway 508 - Yaak to Jct U.S. Route 2
Montana Secondary Highway 509 - Monida to Red Rock Lakes
Montana Secondary Highway 510 - Brockway to Dry Ash Creek
Montana Secondary Highway 511 - Port of Whitetail to Flaxville (Was Montana Highway 13)
Montana Secondary Highway 512 - Hall to xx
Montana Secondary Highway 513 - Hall to Hardin
Montana Secondary Highway 514 - Poplar to xx
Montana Secondary Highway 514 - Plentywood to xx
Montana Secondary Highway 516 - Coalridge to Dagmar (Old Montana Secondary Highway 516 ran from Jct U.S. Route 2 to Katy Lake)
Montana Secondary Highway 517 - Coalridge to Antelope
Montana Secondary Highway 518 - East Helena to Montana City
Montana Secondary Highway 522 - Huntley
Montana Secondary Highway 529 - Chinook to Jct southwest of Chinook
Montana Secondary Highway 532 - Billings to Laurel
Montana Secondary Highway 535 - Billings to xx
Montana Secondary Highway 537 - Hinsdale to xx
Montana Secondary Highway 540 - Wineglass Mountain to Jct near Point of Rocks
Montana Secondary Highway 541 - Windham to Utica
Montana Secondary Highway 543 - Jordan to Hell Creek
Montana Secondary Highway 544 - Boyes to Biddle
Montana Secondary Highway 548 - North Kalispell connector from S-424 to US 2.
Montana Secondary Highway 551 - Geyser to xx
Montana Secondary Highway 552 - Sunburst to Jct Montana Secondary Highway 343
Montana Secondary Highway 563 - Ashland to Springdale
Montana Secondary Highway 564 - Carter to Jct Montana Secondary Highway 223
Montana Secondary Highway 565 - Greenfield to Simms
Montana Secondary Highway 566 - Ashland to Jct Montana Secondary Highway 314
Montana Secondary Highway 567 - Yaak to Libby
Montana Secondary Highway 568 - Nibbe to Huntley
Montana Secondary Highway 569 - Opportunity to Jct Montana Highway 43
Montana Secondary Highway 571 - Emigrant to Jct Montana Secondary Highway 540
Montana Secondary Highway 572 - Chico Hot Springs to JCT Montana Secondary Highway 540
Montana Secondary Highway 573 - Katy Lake to Medicine Lake

Former highways

Montana Highway 4 - Thompson Falls to Idaho state line (Replaced by Forest Service Road NF-7623 and S-471.)
Montana Highway 6 - Townsend to Forsyth
Montana Highway 8 - Crow Agency to Olive
Montana Highway 9 - Lolo to Idaho border at Lolo Pass
Montana Highway 11 - Alberta border at Sweetgrass to Vaughn, became part of U.S. Route 91 in 1934.
Montana Highway 14 - Fairview at the North Dakota border to Glendive
Montana Highway 15 - Chester to Stanford
Montana Highway 18 - Glendive to Grassrange
Montana Highway 20 - North Dakota border at Sidney to Idaho border near Heron (Replaced by MT 200.)
Montana Highway 22 - Saskatchewan border at Port of Ophiem to Wyoming border at Alzada
Montana Highway 26 - Manicke to Trout Creek
Montana Highway 27 - Big Sandy to Winifred
Montana Highway 29 - Great Falls to Port of Wildhorse
Montana Highway 30 - South Dakota border near Midland to Jct U.S. Route 12 northwest of Mizpah
Montana Highway 31 - Bigfork to Drummond
Montana Highway 32 - Rockvale to Yellowstone National Park at Silver Gate
Montana Highway 33 - Choteau to Wolf Creek
Montana Highway 34 - Twin Bridges to Ennis
Montana Highway 36 - Dillon to Gibbons Pass
Montana Highway 45 - Forsyth to Lame Deer via Lee
Montana Highway 50 - Jct U.S. Route 287 to Idaho border at Raynolds Pass
Montana Highway 110 - Opportunity to Drummond
Montana Highway 187 - Wilsall to West Yellowstone
Montana Highway 191 - Jct U.S. Route 10S at Sappington to Jct Montana Highway 187 at Grayling
Montana Highway 789 - Alberta border at Sweetgrass, south along Interstate 15 / U.S. Route 91 to Great Falls, then southeast along U.S. Route 87 to Billings, then southwest along U.S. Route 212 to Laurel, then to Wyoming border south of Warren along U.S. Route 310
Montana Secondary Highway 216 - Jct Interstate 15 to Jct U.S. Route 89 via Valier (Replaced by Montana Highway 44.)
Montana Secondary Highway 230 - Windham to Fort Benton (Replaced by Montana Highway 80.)
Montana Secondary Highway 235 - Brooks to Jct Montana Secondary Highway 230 near Arrow Creek (Replaced by Montana Highway 81.)
Montana Secondary Highway 242 - Port of Morgan at the Saskatchewan border to Malta (Replaced by U.S. Route 191)
Montana Secondary Highway 281 - Cardwell to Boulder (Replaced by Montana Highway 69.)
Montana Secondary Highway 289 - Norris to Bozeman Hot Springs (Replaced by Montana Highway 84.)
Montana Secondary Highway 291 - Bozeman Hot Springs to Belgrade (Replaced by Montana Highway 85.)
Montana Secondary Highway 293 - Wilsall to Bozeman (Old Montana Highway 187 ; replaced by Montana Highway 86.)
Montana Secondary Highway 307 - Columbus to Red Lodge (Now Montana Highway 78.)
Montana Secondary Highway 319 - Jct U.S. Route 212 South of Broadus to Wyoming border south of Biddle (Replaced by Montana Highway 59 in 196x)
Montana Secondary Highway 375 - Continental Drive -- downtown Butte to Jct Old US 10 (Montana Highway 2) southeast of Butte
Montana Secondary Highway 376 - Fort Belknap Agency to Jct U.S. Route 191 near Landusky (Replaced by Montana Highway 66)
Montana Secondary Highway 397 - Belfry to Wyoming border (Replaced by Montana Highway 72)
Montana Secondary Highway 461 - Jct Montana Highway 200 near Paradise to St. Regis (Replaced by Montana Highway 135)
Montana Secondary Highway 483 - Port of Del Bonita to Santa Rita (Replaced by an extension of Montana Secondary Highway 213)
Montana Secondary Highway 498 - In Great Falls (Replaced by bypass U.S. Route 87)
Montana Secondary Highway 499 - Follows the north end of Hebgen Lake from Jct Montana Highway 287 to Jct U.S. Route 191 (Replaced by U.S. Route 287 in 1964)
Montana Secondary Highway 506 - Yaak to Libby (Replaced by Montana Secondary Highway 567)

References

↑ "Route Log & Finder". FHWA. November 2002. Retrieved 2008-10-21.
↑ Montana Department of Transportation (2013). "Montana Road Log" (PDF). p. 117. Retrieved 2015-02-08.
↑ "Kalispell Bypass". Montana Department of Transportation. Retrieved 2015-02-08.

Numbered highways in the United States

National systems	Interstate Highways U.S. Numbered Highways

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