Astronaut Photo Poster of Crater Lake

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According to the U.S. Geological Survey, Crater Lake is the deepest lake in the United States, with an average depth of 350 meters (1,148 feet). Water is lost only by evaporation and seepage, and is only replenished by rainwater and snowmelt from the surrounding crater walls. These processes help maintain minimal sediment input into the lake and exceptional water clarity. The dark blue color of the water shown in this image is typical of Crater Lake; light blue-green areas to the southeast of Wizard Island (along the southern crater rim) probably correspond to particulates, perhaps dust, either on or just below the water surface. This digital camera photograph was taken from the International Space Station on July 19, 2006.

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