Current Mapping Projects

The focus of our current mapping is southwest Montana in the Dillon and Wisdom 30′ x 60′ quadrangles. MBMG geologists are also working with the Idaho Geologic Survey along our common state border to ensure the geology matches.


Statewide Geologic Mapping Status

The MBMG has published over 500 geologic maps. All maps and associated GIS data and databases are available for free download.

Download geologic maps

Recent 1:24,000-scale geologic maps

The following 1:24,000-scale geologic maps have recently been released by the MBMG and are available for download from our online catalog. Click on any map below to view the available products.



Recent 1:100,000-scale geologic maps

The following 1:100,000-scale geologic maps have recently been released by the MBMG and are available for download from our online catalog. Click on any map below to view the available products.