Mount Mazama, a complex volcano in southern Oregon, gradually formed from overlapping volcanic centers before rising to about 12,000 feet. About 7,700 years ago, its climactic eruption emptied magma beneath the summit, triggering a collapse that created the caldera now filled by Crater Lake, or Giiwas in the Klamath language. The surviving rim reaches 8,157 feet, and the lake is 1,943 feet deep, the deepest freshwater body in the United States. Glaciers and later lava flows shaped the surrounding landscape, while the volcano has long held importance for the Klamath and other Native peoples. Today it lies largely within Crater Lake National Park and is considered dormant, though future smaller eruptions are likely.