What state is Yellowstone mostly?

Even though the official address is to the state of Wyoming, Yellowstone is actually in three states. The majority Yellowstone (96%) is in Wyoming. A small section of the park (3%) to the north and northwest is in Montana. And a small section of the park (1%) to the west is in Idaho.



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Yellowstone National Park Location ~ Yellowstone Up Close and Personal. Yellowstone National Park is located in the western United States in Idaho, Montana, and Wyoming. One percent of the Yellowstone is located in Idaho, three percent is located in Montana, and ninety-six percent is located in the state of Wyoming.

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Yellowstone is bigger than two U.S. states. At 3,472 square miles—over 2.2 million acres—Yellowstone is larger than the states of Rhode Island and Delaware combined. The vast majority of its territory is situated in Wyoming, but it also creeps into neighboring Montana and Idaho.

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Yellowstone National Park sits on top of a dormant volcano and is home to more geysers and hot springs than any other place on earth. Wonders abound at this truly unique national park, from sites like the Yellowstone Grand Canyon to wildlife like America's largest buffalo herd, grizzly bears, and wolves.

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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.

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The Yellowstone Caldera in north-western Wyoming is one of the largest volcanoes in the world. In the past 2.1 million years, it has seen three catastrophic eruptions that blanketed North America in ash and a number of smaller eruptions where lava flowed within the caldera, most recently 70,000 years ago.

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The Yellowstone supervolcano last erupted about 640,000 years ago. A sleeping giant is nestled in the western part of the United States. Though it stirs occasionally, it has not risen from slumber in nearly 70,000 years.

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