Lake Waiau

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Lake Waiau is a high-elevation lake located at 13,020 feet (3970 m) above sea level on Mauna Kea, on the island of Hawaiʻi. It is one of the highest lakes in the world (higher than Lake Titicaca), and one of very few in the state of Hawaiʻi. It is relatively small, only about 100 m across, and varies in size as the water level rises and falls. At high water levels a small outlet stream appears at the northwest end, but it is absorbed into the ground after a short distance. The name means "swirling water" in Hawaiian, though it is usually rather placid. It usually freezes in winter, but aquatic insects such as midges and beetles can be found breeding in the water.