Explorer Ferdinand Vandiveer Hayden was instrumental in establishing Yellowstone as the first national park in the United States. The Yellowstone area was one of the last unexplored regions within the United States when Hayden led his expedition into the Yellowstone area in 1871. President Grant signed the law establishing the Yellowstone region as a public park on March 1, 1872.
More Famous Firsts
More Famous Firsts
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