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Act Establishing Yellowstone National Park: Primary Documents in American History

Yellowstone became the nation’s first national park on March 1, 1872. This guide provides access to digital materials at the Library of Congress, external websites, and a print bibliography.


An act establishing Yellowstone National Park was signed into law by President Ulysses S. Grant on March 1, 1872. Officially titled "An Act to set apart a certain Tract of Land lying near the Head-waters of the Yellowstone River as a public Park," this landmark legislation created the first national park.