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 © 15,061,599
SYSTEMS_BIG_HORN.PDF © 3,304,789
SYSTEMS_BLAINE.PDF © 1,815,591
SYSTEMS_BROADWATER.PDF © 3,404,829
SYSTEMS_CARBON.PDF © 2,236,057
SYSTEMS_CARTER.PDF © 1,269,787
SYSTEMS_CASCADE.PDF © 4,489,807
SYSTEMS_CHOUTEAU.PDF © 4,237,861
SYSTEMS_CUSTER.PDF © 1,973,233
SYSTEMS_DANIELS.PDF © 753,835
SYSTEMS_DAWSON.PDF © 1,445,610
SYSTEMS_DEER_LODGE.PDF © 3,012,217
SYSTEMS_FALLON.PDF © 1,018,453
SYSTEMS_FERGUS.PDF © 5,210,546
SYSTEMS_FLATHEAD.PDF © 17,681,746
SYSTEMS_GALLATIN.PDF © 6,744,432
SYSTEMS_GARFIELD.PDF © 3,563,938
SYSTEMS_GLACIER.pdf © 3,519,405
SYSTEMS_GOLDEN_VALLEY.PDF © 777,653
SYSTEMS_GRANITE.PDF © 3,693,046
SYSTEMS_HILL.PDF © 894,473
SYSTEMS_JEFFERSON.PDF © 4,817,845
SYSTEMS_JUDITH_BASIN.PDF © 1,882,986
SYSTEMS_LAKE.PDF © 5,035,400
SYSTEMS_LEWIS_AND_CLARK.PDF © 13,907,103
SYSTEMS_LIBERTY.PDF © 727,649
SYSTEMS_LINCOLN.PDF © 7,287,586
SYSTEMS_MADISON.PDF © 6,148,355
SYSTEMS_MCCONE.PDF © 2,101,619
SYSTEMS_MEAGHER.PDF © 4,682,096
SYSTEMS_MINERAL.PDF © 3,437,396
SYSTEMS_MISSOULA.PDF © 7,189,129
SYSTEMS_MUSSELSHELL.PDF © 1,375,581
SYSTEMS_PARK.PDF © 1,796,556
SYSTEMS_PETROLEUM.PDF © 1,740,287
SYSTEMS_PHILLIPS.PDF © 2,781,329
SYSTEMS_PONDERA.PDF © 2,952,079
SYSTEMS_POWDER_RIVER.PDF © 1,014,921
SYSTEMS_POWELL.PDF © 4,651,475
SYSTEMS_PRAIRIE.PDF © 1,433,287
SYSTEMS_RAVALLI.PDF © 5,493,563
SYSTEMS_RICHLAND.PDF © 2,165,729
SYSTEMS_ROOSEVELT.PDF © 2,925,984
SYSTEMS_ROSEBUD.PDF © 4,848,891
SYSTEMS_SANDERS.PDF © 15,452,966
SYSTEMS_SHERIDAN.PDF © 1,209,663
SYSTEMS_SILVER_BOW.PDF © 3,731,059
SYSTEMS_STILLWATER.PDF © 1,785,488
SYSTEMS_SWEET_GRASS.PDF © 1,177,349
SYSTEMS_TETON.PDF © 4,788,200
SYSTEMS_TOOLE.PDF © 1,703,353
SYSTEMS_TREASURE.PDF © 872,679
SYSTEMS_VALLEY.PDF © 2,974,044
SYSTEMS_WHEATLAND.PDF © 894,949
SYSTEMS_WIBAUX.PDF © 868,438
SYSTEMS_YELLOWSTONE.PDF © 2,597,671