Katmai was first established as a National Monument in 1918, to protect the area surrounding Novarupta volcano, which formed the Valley of Ten Thousand Smokes with its pyroclastic flow after the 1912 eruption. The National Monument was later expanded to cover over 4 million acres, becoming Katmai National Park in 1980. Katmai National Park was named for Mount Katmai, a stratovolcano located within the park.
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