Green Lake (Wisconsin)

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Green Lake
LocationGreen Lake County, Wisconsin, United States
Coordinates43°49′28″N 88°57′52″W / 43.82444°N 88.96444°W / 43.82444; -88.96444Coordinates: 43°49′28″N 88°57′52″W / 43.82444°N 88.96444°W / 43.82444; -88.96444
TypeNatural, pre-glacial valley
Primary inflowsSilver Creek
Primary outflowsPuchyan Creek
Catchment area100 sq mi (260 km2)
Basin countriesUnited States
Max. length7.5 mi (12.1 km)
Max. width3.0 mi (4.8 km)
Surface area7,325 acres (30 km2)
Average depth101 ft (31 m)
Max. depth237 ft (72 m) (deepest natural lake in Wisconsin)
Water volume255,000,000,000 US gal (0.97 km3)
Residence time21 years
Shore length129.3 mi (47.2 km)
Surface elevation796 ft (243 m)
Islands1, manmade at Green Lake Conference Center
SettlementsGreen Lake
1 Shore length is not a well-defined measure.

Green Lake — also known as Big Green Lake (to distinguish it from Little Green Lake, which is near Markesan)— is a lake in Green Lake County, Wisconsin, United States.

The lake has a maximum depth of 237 feet (72 m), making it the deepest natural inland lake in Wisconsin. The lake covers 7,346 acres (30 km2), has 29.3 miles (47.2 km) of shoreline and has an average depth of 100 feet (30 m).[1]

Many large, wooden hotels and one short-lived casino populated the north shore during the late 19th century in the city of Green Lake, but most have burned down. There are three golf courses near Green Lake - Tuscumbia, Mascoutin (near Berlin), and Lawsonia.

Looking over Green Lake at the city of Green Lake

Big Green Lake is known for its fishing. Fish found in Big Green Lake include northern pike, largemouth bass, muskellunge, crappie, walleye, smallmouth bass, channel catfish, white bass, perch, rock bass and cisco and lake trout. The Wisconsin inland lake record lake trout was caught on Big Green Lake by Joseph Gotz on June 1, 1957 and weighed 35 lb 4 oz (16.0 kg) The Wisconsin record cisco was caught on Big Green on June 12, 1969 by Joe Miller and weighed 4 lb 10.5 oz (2.11 kg)

The sources of Green Lake's water, in approximate percentages, are: direct precipitation, 51%; surface water, 41%; ground water, 8%. It is spring-fed and empties into the Fox River through the Puchyan River. The lake's Native American name is Day Cho Lah.


The Green Lake Conservancy is an organization dedicated to preserving the lands surrounding Green Lake. It has worked to establish trails, restore native habitat, and promote a sense of stewardship among young people by providing nature experiences and camps.[2][better source needed]


  1. ^ "Wisconsin's Largest Water Areas" in Wisconsin Legislative Reference Bureau. State of Wisconsin 2005-2006 Blue Book. Madison: Wisconsin Legislature Joint Committee on Legislative Organization, 2005, p. 691.
  2. ^ Wallenfang, Lindsie (January 2017). "Green Lake Conservancy". Green Lake Magazine. Retrieved December 12, 2017.

External links[edit]

Big Green Lake page from the Wisconsin Department of Natural Resources