Crater Lake is a crater lake in south-central Oregon. It is the main feature of Crater Lake National Park and is famous for its deep blue color and water clarity. It was formed around 7,700 years ago by the collapse of the volcano Mount Mazama. With a depth of 1,949 feet (594 m), the lake is the deepest in the United States. Crater Lake features two small islands. Wizard Island, located near the western shore of the lake, is a cinder cone approximately 316 acres (128 ha) in size. Phantom Ship, a natural rock pillar, is located near the southern shore.
The top of Wizard Island reaches 6,933 feet (2,113 m) above sea level, about 755 feet (230 m) above the average surface of the lake.