Crater Lake National Park is a United States National Park located in southern Oregon

Southern Oregon

Southern Oregon is a region of the U.S. state of Oregon south of Lane County and generally west of the Cascade Range, excluding the southern Oregon Coast. Counties include Douglas, Jackson, Klamath, and Josephine. It includes the Southern Oregon American Viticultural Area, which consists of the...

. Established in 1902, Crater Lake National Park is the sixth oldest national park in the United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 and the only one in the state of Oregon

Oregon

Oregon is a state in the Pacific Northwest region of the United States. It is located on the Pacific coast, with Washington to the north, California to the south, Nevada on the southeast and Idaho to the east. The Columbia and Snake rivers delineate much of Oregon's northern and eastern...

. The park encompasses the caldera

Caldera

A caldera is a cauldron-like volcanic feature usually formed by the collapse of land following a volcanic eruption, such as the one at Yellowstone National Park in the US. They are sometimes confused with volcanic craters...

 of Crater Lake

Crater Lake

Crater Lake is a caldera lake located in the south-central region of the U.S. state of Oregon. It is the main feature of Crater Lake National Park and famous for its deep blue color and water clarity. The lake partly fills a nearly deep caldera that was formed around 7,700 years agoby the...

, a remnant of a destroyed volcano

Volcano

2. Bedrock3. Conduit 4. Base5. Sill6. Dike7. Layers of ash emitted by the volcano8. Flank| 9. Layers of lava emitted by the volcano10. Throat11. Parasitic cone12. Lava flow13. Vent14. Crater15...

, Mount Mazama

Mount Mazama

Mount Mazama is a destroyed stratovolcano in the Oregon part of the Cascade Volcanic Arc and the Cascade Range. The volcano's collapsed caldera holds Crater Lake, and the entire mountain is located within Crater Lake National Park....

, and the surrounding hills and forests.

The lake is 1949 feet (594.1 m) deep at its deepest point, which makes it the deepest lake in the United States, the second deepest in North America and the ninth deepest in the world.Crater Lake is often referred to as the seventh deepest lake in the world, but this former listing excludes the approximately 3000 feet (914.4 m) depth of subglacial Lake Vostok

Lake Vostok

Lake Vostok is the largest of more than 140 subglacial lakes found under the surface of Antarctica. The overlying ice provides a continuous paleoclimatic record of 400,000 years, although the lake water itself may have been isolated for 15 to 25 million years. The lake is named after the...

 in Antarctica, which resides under nearly 13000 feet (3,962.4 m) of ice, and the recent report of a 2740 feet (835.2 m) maximum depth for Lake O'Higgins/San Martin, located on the border of Chile and Argentina However, when comparing its average depth of 1148 feet (349.9 m) to the average depth of other deep lakes, Crater Lake becomes the deepest in the Western Hemisphere and the third deepest in the world.