Montana/Dakotas · 59 of 1,120 · BLM's list, read Oct 20, 2026
Montana/Dakotas
59 areas, 480,426 acres, some of them in South Dakota, which BLM's Montana/Dakotas office also manages. At least 59 of them have a claim, lease or right of way inside the line, or a grazing allotment across it.
Every Area of Critical Environmental Concern BLM's Montana/Dakotas office holds, the ones with the most inside the line first. Each row opens the area's page: its line, what BLM found there and what sits inside it.
Every area, the most inside first
- Elkhorn Mountains53,434 acres · at least 466 active mining claims and 3 more BLM lists as Filed, 24 rights of way, 49 grazing allotments covering part of it539inside
- Mountain Plover24,793 acres · at least 50 active mining claims, 8 grazing allotments covering part of it58inside
- East Pryor Mountain11,061 acres · at least 24 active mining claims, 3 rights of way, 4 grazing allotments covering part of it31inside
- Centennial Mountains40,782 acres · 10 rights of way, 17 grazing allotments covering part of it27inside
- Sweetgrass Hills7,599 acres · 13 rights of way, 10 grazing allotments covering part of it23inside
- Kevin Rim4,647 acres · 8 oil and gas leases, 10 rights of way, 5 grazing allotments covering part of it23inside
- Zortman/Landusky Mine Reclamation2,686 acres · at least 4 active mining claims, 17 rights of way, 2 grazing allotments covering part of it23inside
- Frenchman Breaks42,020 acres · 2 rights of way, 16 grazing allotments covering part of it18inside
- Muddy Creek/Big Sheep Creek13,098 acres · 1 oil and gas lease, 2 rights of way, 15 grazing allotments covering part of it18inside
- Four Dances792 acres · 18 rights of way18inside
- Everson Creek8,815 acres · at least 4 active mining claims, 5 rights of way, 8 grazing allotments covering part of it17inside
- Woody Island32,871 acres · 1 right of way, 15 grazing allotments covering part of it16inside
- Fort Meade Recreation Area6,386 acres · 14 rights of way, 2 grazing allotments covering part of it16inside
- Hell Creek37,534 acres · 5 rights of way, 9 grazing allotments covering part of it14inside
- Bitter Creek60,885 acres · 2 rights of way, 9 grazing allotments covering part of it11inside
- Sand Arroyo12,314 acres · 1 right of way, 9 grazing allotments covering part of it10inside
- Powderville9,518 acres · 10 grazing allotments covering part of it10inside
- Virginia City Historic District513 acres · at least 4 active mining claims, 1 right of way, 3 grazing allotments covering part of it8inside
- Pompeys Pillar434 acres · 8 rights of way8inside
- Weatherman Draw12,282 acres · 2 rights of way, 5 grazing allotments covering part of it7inside
- Humbug Spires8,374 acres · 2 rights of way, 5 grazing allotments covering part of it7inside
- Big Bend of the Milk River1,992 acres · 1 right of way, 6 grazing allotments covering part of it7inside
- Cow Creek19,414 acres · 6 grazing allotments covering part of it6inside
- Block Mountain8,631 acres · 1 right of way, 5 grazing allotments covering part of it6inside
- Ash Creek Divide8,283 acres · 6 grazing allotments covering part of it6inside
- Grove Creek8,252 acres · 3 rights of way, 3 grazing allotments covering part of it6inside
- Acid Shale-Pine Forest2,674 acres · 6 grazing allotments covering part of it6inside
- Powder River Depot1,964 acres · 1 right of way, 5 grazing allotments covering part of it6inside
- Malta Geologic6,153 acres · 1 right of way, 4 grazing allotments covering part of it5inside
- Phil Wright Rock638 acres · 3 rights of way, 2 grazing allotments covering part of it5inside
- Meeteetse Spires1,523 acres · 1 right of way, 3 grazing allotments covering part of it4inside
- Finger Buttes1,521 acres · 4 grazing allotments covering part of it4inside
- Reynolds Battlefield928 acres · 4 grazing allotments covering part of it4inside
- Bridger Fossil577 acres · 4 grazing allotments covering part of it4inside
- Ringing Rocks161 acres · 4 grazing allotments covering part of it4inside
- Sleeping Giant11,679 acres · 1 right of way, 2 grazing allotments covering part of it3inside
- Pryor Foothills2,606 acres · 3 grazing allotments covering part of it3inside
- Centennial Sandhills1,047 acres · 3 grazing allotments covering part of it3inside
- Cedar Creek Battle Field1,022 acres · 3 grazing allotments covering part of it3inside
- Stark Site799 acres · 3 grazing allotments covering part of it3inside
- Big Sheep Mountain363 acres · 3 grazing allotments covering part of it3inside
- Bug Creek3,839 acres · 2 grazing allotments covering part of it2inside
- Walstein1,519 acres · 2 grazing allotments covering part of it2inside
- Square Butte797 acres · 2 grazing allotments covering part of it2inside
- Blue Lake430 acres · 2 grazing allotments covering part of it2inside
- Fossil Cycad318 acres · 1 right of way, a grazing allotment covering part of it2inside
- Petroglyph Canyon239 acres · 2 grazing allotments covering part of it2inside
- Battle Butte Battlefield237 acres · 2 grazing allotments covering part of it2inside
- Hoe145 acres · 1 right of way, a grazing allotment covering part of it2inside
- Smokey Butte40 acres · 1 right of way, a grazing allotment covering part of it2inside
- Bear Creek Flats569 acres · 1 right of way1inside
- Flat Creek339 acres · a grazing allotment covering part of it1inside
- Castle Butte184 acres · a grazing allotment covering part of it1inside
- Long Medicine Wheel179 acres · a grazing allotment covering part of it1inside
- Jordan Bison Kill161 acres · a grazing allotment covering part of it1inside
- Azure Cave143 acres · a grazing allotment covering part of it1inside
- Beaverhead Rock124 acres · a grazing allotment covering part of it1inside
- Seline80 acres · a grazing allotment covering part of it1inside
- Rattler Gulch Limestone Cliffs19 acres · a grazing allotment covering part of it1inside
SheetMontana/DakotasLines59Acres480,426Inked1986 to 2020ReadOct 20, 2026
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