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Region
- Montana[remove]58
- Judith River Formation3
- Lakota Formation3
- Powder River (Wyo. and Mont.)3
- Clark Fork (Mont. and Idaho)2
- Wyoming2
- Bearpaw Formation1
- Benton Lake National Wildlife Refuge (Mont.)1
- Big Sky Mine (Mont.)1
- Clark Fork Watershed (Mont. and Idaho)1
- Deer Lodge Valley (Mont.)1
- Freezout Lake Wildlife Management Area (Mont.)1
- Gallatin River Watershed (Wyo. and Mont.)1
- Idaho1
- Madison River Valley (Wyo. and Mont.)1
- Missouri River Valley1
- Missouri River Watershed1
- MontanaGlacier National Park1
- MontanaPhillips County1
- MontanaPowder River County1