Yellowstone National Park forms the core of the Greater Yellowstone Ecosystem (GYE). At 28,000 square miles, it is one of the largest intact temperate-zone ecosystems on Earth. Greater Yellowstone’s diversity and natural wealth includes the hydrothermal features, the wildlife, the lakes, the Grand Canyon of the Yellowstone River, and the petrified trees of Yellowstone National Park. Three states and the federal government share management responsibility for the ecosystem, in partnership with local communities and conservation organizations.
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Each of the states that spans the GYE has its own character and collection of natural and cultural attractions that make it unique and worth visiting.