Crater Lake

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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 2,148 foot (655 m) deep caldera[1] that was formed around 7,700 (± 150) years ago[2] by the collapse of the volcano Mount Mazama.

On June 12, 1853, John Wesley Hillman was reportedly the first White to see what he named "Deep Blue Lake" in Oregon. The lake was renamed at least three times, as Blue Lake, Lake Majesty, and finally Crater Lake.[3][4]

Crater Lake is known for the "Old Man of the Lake", a full-sized tree which is now a stump that has been bobbing vertically in the lake for more than a century.[5] Due to the cold water, the tree has been rather well preserved.

While having no indigenous fish population, the lake was stocked from 1888 to 1941 with a variety of fish. Several species have formed self sustaining populations.[6] Since 2002, one of the state's regular-issue license plate designs has featured Crater Lake.[7] The commemorative Oregon State Quarter, which was released by the United States Mint in 2005, features an image of Crater Lake on its reverse.[8]

Contents

Dimensions and depth

Crater Lake is located in Klamath County, approximately 60 miles (97 km) northwest of the county seat of Klamath Falls, and about 80 miles (130 km) northeast of the city of Medford.[9]

The lake is 5 by 6 miles (8 by 10 km) across with an average depth of 1,148 feet (350 m). Its maximum depth has been measured at 1,949 feet (594 m),[1][10] which fluctuates slightly as the weather changes.[1] This makes Crater Lake the deepest lake that is completely in the United States, the second deepest lake in North America, and the ninth deepest lake in the world (Lake Baikal is the deepest). Crater Lake is often cited as the seventh deepest lake in the world, but this ranking excludes Lake Vostok, which is situated under nearly 13,000 feet (4,000 m) of Antarctic ice, and the recent soundings of San Martín Lake, which is located on the border of Chile and Argentina.

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