West Okoboji Lake
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West Okoboji Lake is a natural body of water, approximately 3,847 acres (15.57 km2) in area, in Dickinson County in northwest Iowa in the United States. It is part of the chain of lakes known as the Iowa Great Lakes. The area was long inhabited by the Santee or Dakota Sioux. The Dakota-language name for the lake was Minnetonka, meaning "great waters".
The cities of Arnolds Park, Okoboji, West Okoboji, and Wahpeton sit on its shore. Okoboji was derived from the Dakota name for the lake, and Wahpeton was the name of one of the major historic Sioux bands in the nineteenth century. Today the Sisseton-Wahpeton Sioux are a federally recognized tribe.
Its maximum depth is 136 feet (41 m), making it the deepest lake in Iowa and second in size only to Spirit Lake. The mean depth is 39 feet (12 m). The drainage area of the lake is approximately 125 square miles (320 km2).
Geologically, the lake, like its neighbors, is a glacial pothole, a remnant of the most recent ice age approximately 13,000 years ago.
West Okoboji is often considered to be one of three blue water lakes in the world. The other two are Lake Geneva in Switzerland and Lake Louise in Canada.
The depth of the lake makes it a popular regional destination for motor boating, water skiing, sailing, and swimming. The lake is also a popular fishing destination in the region.