Montana Department of Transportation

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MDT County Maps

Always up to date live Interactive Maps can be found here: Highway Systems | Functional Class

The County System Routes maps listed below are current as of September 2018. They have been constructed in ArcGIS 10.6.1 Using ArcMap. Esri, Inc.

  • These maps are updated annually to show current On System Routes. On System Routes are comprised of the Interstate NHS, Non-Interstate NHS, State Primary, and State Secondary routes.
County System RoutesFile Size
SYSTEMS_BEAVERHEAD.PDF © 15,869,388
SYSTEMS_BIG_HORN.PDF © 3,794,427
SYSTEMS_BLAINE.PDF © 2,036,279
SYSTEMS_BROADWATER.PDF © 3,766,989
SYSTEMS_CARBON.PDF © 2,146,687
SYSTEMS_CARTER.PDF © 1,381,333
SYSTEMS_CASCADE.PDF © 5,011,486
SYSTEMS_CHOUTEAU.PDF © 4,867,291
SYSTEMS_CUSTER.PDF © 2,163,449
SYSTEMS_DANIELS.PDF © 841,618
SYSTEMS_DAWSON.PDF © 1,628,517
SYSTEMS_DEER_LODGE.PDF © 3,475,588
SYSTEMS_FALLON.PDF © 1,115,930
SYSTEMS_FERGUS.PDF © 5,670,348
SYSTEMS_FLATHEAD.PDF © 24,117,355
SYSTEMS_GALLATIN.PDF © 7,248,042
SYSTEMS_GARFIELD.PDF © 3,883,442
SYSTEMS_GLACIER.pdf © 4,179,590
SYSTEMS_GOLDEN_VALLEY.PDF © 850,630
SYSTEMS_GRANITE.PDF © 4,234,949
SYSTEMS_HILL.PDF © 1,010,093
SYSTEMS_JEFFERSON.PDF © 5,317,066
SYSTEMS_JUDITH_BASIN.PDF © 2,044,156
SYSTEMS_LAKE.PDF © 5,606,377
SYSTEMS_LEWIS_AND_CLARK.PDF © 14,878,913
SYSTEMS_LIBERTY.PDF © 815,060
SYSTEMS_LINCOLN.PDF © 7,970,645
SYSTEMS_MADISON.PDF © 6,709,589
SYSTEMS_MCCONE.PDF © 2,315,954
SYSTEMS_MEAGHER.PDF © 5,018,688
SYSTEMS_MINERAL.PDF © 3,864,907
SYSTEMS_MISSOULA.PDF © 7,934,155
SYSTEMS_MUSSELSHELL.PDF © 1,507,523
SYSTEMS_PARK.PDF © 1,940,169
SYSTEMS_PETROLEUM.PDF © 2,011,586
SYSTEMS_PHILLIPS.PDF © 3,091,607
SYSTEMS_PONDERA.PDF © 3,859,733
SYSTEMS_POWDER_RIVER.PDF © 1,114,604
SYSTEMS_POWELL.PDF © 5,053,151
SYSTEMS_PRAIRIE.PDF © 1,556,777
SYSTEMS_RAVALLI.PDF © 6,276,185
SYSTEMS_RICHLAND.PDF © 2,450,913
SYSTEMS_ROOSEVELT.PDF © 3,247,535
SYSTEMS_ROSEBUD.PDF © 5,240,650
SYSTEMS_SANDERS.PDF © 16,743,748
SYSTEMS_SHERIDAN.PDF © 1,307,075
SYSTEMS_SILVER_BOW.PDF © 4,227,892
SYSTEMS_STILLWATER.PDF © 1,942,300
SYSTEMS_SWEET_GRASS.PDF © 1,284,901
SYSTEMS_TETON.PDF © 5,287,214
SYSTEMS_TOOLE.PDF © 1,867,585
SYSTEMS_TREASURE.PDF © 970,370
SYSTEMS_VALLEY.PDF © 3,233,976
SYSTEMS_WHEATLAND.PDF © 985,218
SYSTEMS_WIBAUX.PDF © 972,975
SYSTEMS_YELLOWSTONE.PDF © 2,842,251