Alaska · 40 of 1,120 · BLM's list, read Oct 20, 2026
Alaska
40 areas, 7,531,703 acres. At least 9 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 Alaska 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
- Jim River ACEC202,703 acres · at least 30 active mining claims, 1 right of way31inside
- Toolik Lake RNA78,027 acres · 30 rights of way30inside
- Galbraith Lake ACEC53,949 acres · 17 rights of way17inside
- Indian River ACEC161,195 acres · 3 rights of way3inside
- Poss Mountain ACEC8,732 acres · at least 3 active mining claims3inside
- Fortymile ACEC359,407 acres · 2 rights of way2inside
- Nulato Hills (KSP) ACEC1,079,924 acres · 1 right of way1inside
- Bering Glacier RNA824,144 acres · 1 right of way1inside
- Hogatza River Tributaries ACEC30,508 acres · 1 right of way1inside
- Western Arctic Caribou Insect Relief ACEC1,458,712 acres · nothing placed inside0inside
- Tozitna River ACEC872,628 acres · nothing placed inside0inside
- Salmon Fork ACEC623,046 acres · nothing placed inside0inside
- Inglutalik River (KSP) ACEC466,143 acres · nothing placed inside0inside
- Ungalik River (KSP) ACEC259,849 acres · nothing placed inside0inside
- Shaktoolik River (KSP) ACEC232,730 acres · nothing placed inside0inside
- Neacola Mountains ACEC230,156 acres · nothing placed inside0inside
- Tozitna Subunit North ACEC130,225 acres · nothing placed inside0inside
- Mount Osborn ACEC74,594 acres · nothing placed inside0inside
- Tozitna Subunit South ACEC62,638 acres · nothing placed inside0inside
- Nigu-Iteriak ACEC56,876 acres · nothing placed inside0inside
- Dulbi-Kaiyuh Mountains Subunit ACEC54,248 acres · nothing placed inside0inside
- Nulato Hills (CY) ACEC41,733 acres · nothing placed inside0inside
- Mosquito Flats ACEC36,837 acres · nothing placed inside0inside
- Carter Spit ACEC36,218 acres · nothing placed inside0inside
- Sulukna River ACEC23,266 acres · nothing placed inside0inside
- Galena Mountain ACEC19,360 acres · nothing placed inside0inside
- Arms Lake RNA10,589 acres · nothing placed inside0inside
- Spooky Valley RNA8,842 acres · nothing placed inside0inside
- West Fork Atigun River ACEC8,532 acres · nothing placed inside0inside
- Limestone Jags RNA4,884 acres · nothing placed inside0inside
- Serpentine Slide RNA4,749 acres · nothing placed inside0inside
- McQuesten Creek RNA3,930 acres · nothing placed inside0inside
- Redlands Lake RNA3,829 acres · nothing placed inside0inside
- Mount Prindle (WMNRA) RNA3,091 acres · nothing placed inside0inside
- Mount Prindle (SNCA) RNA2,847 acres · nothing placed inside0inside
- Ishtalitna Creek Hot Springs RNA1,056 acres · nothing placed inside0inside
- Lake Todatonten Pingos RNA658 acres · nothing placed inside0inside
- South Todatonten Summit RNA655 acres · nothing placed inside0inside
- Big Windy Hot Spring RNA151 acres · nothing placed inside0inside
- Kanuti Hot Springs ACEC43 acres · nothing placed inside0inside
SheetAlaskaLines40Acres7,531,703Inked1986 to 2016ReadOct 20, 2026
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Hover or tap any line. States: the Census Bureau's outlines. The Aleutians west of the 180th meridian are left off.