For the first time in more than 100 years the Umatilla, an American Indian tribe, are able to hunt and harvest a bison just outside Yellowstone National Park, restoring a centuries-old tradition guaranteed by a treaty signed in 1855.

The Confederated Tribes of the Umatilla Indian Reservation are the federally recognized confederations of three Sahaptin-speaking Native American tribes who traditionally inhabited the Columbia River Plateau region: the Cayuse, Umatilla, and Walla Walla.

In the United States, an American Indian tribe, Native American tribe, Alaska Native village, Indigenous tribe, or Tribal nation may be any current or historical tribe, band, or nation of Native Americans in the United States. Modern forms of these entities are often associated with land or territory of an Indian reservation. "Federally recognized Indian tribe" is a legal term in United States law with a specific meaning.

A bison is a large bovine in the genus Bison within the tribe Bovini. Two extant and numerous extinct species are recognised.

Yellowstone National Park is a national park of the United States located in the northwest corner of the state of Wyoming, with small portions extending into Montana and Idaho. It was established by the 42nd U.S. Congress through the Yellowstone National Park Protection Act and signed into law by President Ulysses S. Grant on March 1, 1872. Yellowstone was the first national park in the US, and is also widely understood to be the first national park in the world. The park is known for its wildlife and its many geothermal features, especially the Old Faithful geyser, one of its most popular. While it represents many types of biomes, the subalpine forest is the most abundant. It is part of the South Central Rockies forests ecoregion.