Katmai Caldera, a collapse feature that formed during the catastrop...

Katmai Caldera is a steep-walled, 1.5-km (1 mi)-diameter crater that truncates a formerly 2,290-m (7,513 ft)-high stratovolcano. The caldera is partially filled by a blue-green lake about 250 m (820 ft) deep. The lake level was still rising when last measured in the mid-1970's. Beyond the caldera are the multiple peaks of Trident Volcano; Mount Mageik volcano is the snow and ice-covered cone on the skyline. View is to the northeast.