Yellowstone National Park is located primarily in the U.S. state of Wyoming, but also extends into Montana and Idaho.
It was the first national park in the United States, established by Congress and signed into law by President Ulysses S. Grant in 1872.
Yellowstone is widely considered to be the first national park in the world.
The park covers an area of 2.2 million acres (8,983 square kilometers) and is home to a wide variety of wildlife, including grizzly bears, wolves, bison, and elk.
The park is managed by the National Park Service and is part of the Greater Yellowstone Ecosystem, one of the largest nearly intact temperate-zone ecosystems in the world.
Yellowstone is a popular tourist destination, with millions of visitors each year. Activities in the park include hiking, camping, fishing, and wildlife watching.