• Aerial view of Aniakchak Caldera taken from northern rim

    Aniakchak

    National Monument & Preserve Alaska

News

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Current Press Releases can be found here.

 

Did You Know?

Did You Know?

The outlet of the Aniakchak River, referred to as "The Gates," was formed when water within the caldera breached the rim and carved through the wall. Terrace deposits above the current water level of Surprise Lake indicate that the lake once filled 50 percent more of the caldera.