Lake and Peninsula Borough topographic maps
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Mount Aniakchak
United States > Alaska > Lake and Peninsula Borough
Milky-green Surprise Lake has an area of 2.75 square kilometers (1.06 sq mi) and abuts the inner northeastern margin of the caldera. Its water is about 19.5 meters (64 ft) deep and originates from various hot springs, cold springs and meltwater. Lake waters are continually mixed by strong winds. Hydrothermal…
Average elevation: 483 m