Yellowstone National Park


Yellowstone National Park
Highway 14/16/20 or 191/89/287
Yellowstone National Park, WY 82190
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Long before any recorded human history in Yellowstone, a massive volcanic eruption spewed an immense volume of ash that covered all of the western U.S., much of the Midwest, northern Mexico and some areas of the eastern Pacific. The eruption dwarfed that of Mt. St. Helens in 1980 and left a caldera 30 miles wide by 45 miles long.

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