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The Explorations That Led To The World’s First National Park

The Yellowstone region was known for millennia by Indigenous people, who would frequent the area in search of game and other resources—they had been in the area for at least 11,000 years! Obsidian from the region was an especially prized commodity, and artifacts made from obsidian taken from Yellowstone’s numerous lava flows have been found as far east as the Ohio River Valley.