The lake is shallow, with an average depth of 10 ft (3 m) and a maximum depth of 22 ft (7 m). During the summer months, it is prone to stratification and to overgrowth with algae.
Geology
Geologically, the lake, like its neighbors, is a glacial pothole, a remnant of the most recent ice age approximately 13,000 years ago.
Fishing
The lake is a popular fishing destination in the region, especially for the catching of bullheads.
External link
Iowa Department of Natural Resources site (http://www.iowadnr.com/fish/fishing/lakes/eok30s.html) on East Okoboji Lake
University of Iowa site (http://wqm.igsb.uiowa.edu/publications/lake_report01/EastOkobojiLake/EastOkobojiLake.htm) on East Okoboji Lake chemistry