Yellowstone National Parkis a national park located primarily in the U.S. state of Wyoming.

It was established by the U.S. Congress and signed into law by President Ulysses S. Grant on March 1, 1872.

Yellowstone National Park spans an area of 3,468.4 square miles (8,983 km2),comprising lakes, canyons, rivers and mountain ranges.

The 1988 fires affected 793,880 acres or 36 percent of the park. Five fires burned into the park that year from adjacent public lands. The largest, the North Fork Fire, started from a discarded cigarette. It burned more than 410,000 acres.

Large variety of mammals, birds, fish, reptiles and amphibians resides in Yellowstone National Parkis.