Referred to locally as the lake turning over the thermocline is a feature of lakes with deep water. The water on the top of the lake changes temperature much more variably during the year. On West Lake, it can reach as much as 75 degrees in July while the water below, greater than 35 or 40 feet deep is relatively stable around 45 degrees. In the fall and early winter, the top strata of the lake will cool to below 45 degrees, and then because it becomes denser, it will "sink" below the lower strata, thus, displacing it and making the lake "turn-over". In the deepest part of West Lake (near the 136ft mark), no light is availble, and hence little life is known whether fish or plant. Typically questions are raised as to why the surface water gets dirty for a short period of time in the fall, this this is the standard answer.

Pike's Point is located at 15973 213th Ave, Spirit Lake, IA on beautiful West Lake Okoboji. It is one of the largest parks in the Iowa Great Lakes, and provides for all kinds of activities including fishing, swimming, bird watching etc. This park also has a rest room, and a beach. If coming by boat, one wants to be careful as the point extends far into the lake, and there is a warning buoy roughly 300 feet from the point of shore. In 2010, many trees here were uprooted because of some severe straight line winds during the storm that reaked havoc through the Iowa Great Lakes.

Okoboji Boat Works is home to "The Fish Shack" and "The Inconvenience Store". Formerly a marina of thriving boat sales since 1890, OBW now offers up many different rentals, a 24 hour gas dock, excursion boats, and more. I remember the days as a child of fishing for crappie and blue gill here and along the docks of Smith's Bay. Though the scenery has changed, the outstanding fishing has not.