The body of water popular as Lost Lake is an interesting geological oddity. Each year the entire lake disappears during the winter. However, the disappearance does not occur due to evaporation.
The entire volume of Lost Lake quite literally disappears down a hole.
The small lake lies in Santiam Pass, Oregon, in the United States, and forms part of the Mount Hood National Forest. Local Native Americans called the lake Kwoneksamach. European Americans first discovered it in the 1870s.
When present, Lost Lake remains a small, shallow, closed-basin lake approximately 18 mi (29 km) southwest of Mount Jefferson.
Lost Lake Mysterious Nature
The entire region is part of an extensive lava bed which formed about 3,000 years ago. The source of the drainage is a lava tube formed during the period of volcanic activity. This lava tube is roughly 6 ft (2 m) wide.
During the spring and summer, the lake is full thanks to a combination of rainfall and the prodigious volume of runoff from snowmelt in the nearby mountains. During the winter the inflow ceases, and the water drains away.
However, exactly where the water draining from Lost Lake goes remains a mystery at this time.