Montana State Mapping Program

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Mapping Program Objectives

Larger-scale maps

The objectives of the geologic mapping program at MBMG are:

  1. Map the geology of Montana, at various scales.
  2. Establish digital geologic map databases for the State.
  3. Publish geologic maps as open-file reports and formal publications, in digital and/or hard-copy format.
  4. Prepare 1:100,000-scale geologic map coverage for the State, available in digital form (see index below of maps).
  5. Prepare geologic maps at the 1:50,000 or larger scale, available digitally, for areas of the State where population growth, resources, and environmental concerns are most critical, or where detailed geologic mapping is required to address regional geologic problems (see Special Focus Map and EDMAP projects).

Contributing Programs

STATEMAP Program. Administered by the U.S. Geological Survey as a part of the National Geologic Mapping Act of 1992.

EDMAP Program. Administered by the U.S. Geological Survey as a part of the National Geologic Mapping Act of 1992.

Map Product Information

Completed geologic maps are available as paper hardcopies and downloadable PDF files. For all 1:100,000-scale maps and some larger-scale maps, the digital data are also available. USGS 1:250,000-scale maps are available in hard copy from the USGS or from the MBMG. Digital data for USGS-produced maps are available from the USGS.


Quadrangle Maps—1:100,000 and 1:250,000 scale

Click within the map to find the report for that area.
Click within area of interest to find the name of the report

Choteau- !:100,000- I-1300 Choteau 30x60' USGS White Sulphur Springs 100k geologic map  Geology of GlacierNational Park, i-1508f Sand Point USGS 1:250,000 mapping Canyon Ferry Dam Hebgen Lake Ringling -511 Dubois -490 Butte -363 Missoula East Bonners Ferry USGS mapping Valier Fort Benton Cut Bank Whitewater Opheim Ennis-529 Lima -408 I-2593  south western part of Cut Bank Philipsburg Great Falls North Great Falls South Roundup -404 Big Timber- 405 Livingston- 406 Bozeman Jordan Wolf Point Fort Peck Lake East Glasgow Scobey Circle Richey Glendive Sidney Culbertson Plentywood Lodge Grass - gm 56 Hardin - gm 57 Alzada - 433 Broadus -432 Birney- 431 Ekalaka -430 Powderville -429 Lame Deer - 428 Miles City - 426 Baker- 427 Hysham -486 Wibaux -465 Terry - 477 Angela - 485 Forsyth- 425 Melstone 513 Sand Springs Fort Peck Lake West Malta Bridere- gm58 Billings-gm 59 Musselshell-386 Winett Zoretman Dodson Harlem Big Snow Mountains -341 Lewistown Winifred Rocky Boy Havre Gardiner- 387 Belt -450 Lonesome Lake Chester Conrad Sweet Grass Hills Townsend Butte South Leadore Nez Perce Pass Hamilton Missoula West Plains Wallace 30x60 Wallace Kalispell, I 2267 Harlowton-434 Red Lodge Dillon 1x2