On March 1, 1872 Grant signed legislation establishing Yellowstone as the nation's first national park.
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On August 25, 1916, President Woodrow Wilson signed the act creating the National Park Service, a new federal bureau in the Department of the Interior responsible for protecting the 35 national parks and monuments then managed by the department and those yet to be established.
Theodore Roosevelt called President Grant the “father of the national parks” for signing into existence the first National Park in the U.S. In 1871 Congress allocated $40,000 (then a huge sum) to finance an expedition to an area called Yellowstone, a location that then was mainly known from traveler's stories.
Honoring U.S. President Theodore Roosevelt, it is the only American national park named directly after a single person. The park covers 70,446 acres (110.072 sq mi; 28,508 ha; 285.08 km2) of land in three sections: the North Unit, the South Unit, and the Elkhorn Ranch Unit.
What Is the State With the Most National Parks? That state with the most national parks is California, with nine of the nation's 61 national parks within its borders. The total acreage of these nine national parks in California is more than 6.3 million acres.
Roosevelt went on to strengthen the protections of public lands, campaigning on conservation for the Vice Presidency in 1900 and later as President, establishing the National Parks system that currently protects not just Yellowstone, but 85 million total acres of American lands.
The smallest park is Gateway Arch National Park, Missouri, at 192.83 acres (0.7804 km2). The total area protected by national parks is approximately 52.4 million acres (212,000 km2), for an average of 833 thousand acres (3,370 km2) but a median of only 220 thousand acres (890 km2).
As Hayden met with Congressmen to lobby for Yellowstone National Park, he was joined by a number of interested parties. Jay Cooke, an investment banker who was selling bonds for the Northern Pacific Railroad, sent his brother Henry, who knew everyone worth knowing in Washington. He was a particular friend of Ulysses S.
Instead, the name was attributed as early as 1805 to Native Americans who were referring to yellow sandstones along the banks of the Yellowstone River in eastern Montana, several hundred miles downstream and northeast of the Park.