National parks index 2012 2016 npsgov homepage us . Get to know your national park system this index is a complete administrative listing of the national park systems areas and related areas including historical documentation to distinguish between the types of national park service sites. The national parks index 1916 2016 revised to include the actions of the 114th congress ending december 31 2015 produced by the office of communications and the office of legislative and congressional affairs national park service us department of the interior washington dc 1 . The united states has 60 protected areas known as national parks that are operated by the national park service an agency of the department of the interiornational parks must be established by an act of the united states congressa bill creating the first national park yellowstone was signed into law by president ulysses s grant in 1872 followed by mackinac national park in 1875 . National parks index 2012 2016 list of national parks of the united states wikipedia the united states has 60 protected areas known as national parks that are operated by the national park service an agency of the department of the interiornational parks must be
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