Lake Johanna

How big is Lake Johanna?

How deep is Lake Johanna?

What kind of fish can you catch in Lake Johanna?

What are the closest cities to Lake Johanna?

Are there boat launches on Lake Johanna?

Are there places to eat and drink near Lake Johanna?

Lake Johanna is a shallow prairie lake located in southeastern Pope County. The lake is comprised of a large southern basin with a maximum depth of 10 feet, and a northern basin and many smaller bays that are generally less than 6 feet deep. The many shallow bays are often densely vegetated and sustain clearer water. Water transparency exceeded 10 feet at time of the June 2022 survey. Water quality and clarity in the main basin can decline during summer months, especially after curly leaf pondweed deteriorates. Fish community structure and fishing quality continue to be influenced by severity and frequency of winterkill events. Fish predation by abundant populations of American White Pelican and Double-crested Cormorant may also affect this fishery. Most of the angling pressure in the summer months consists of anglers targeting Largemouth Bass and Northern Pike. Recreational activities in the winter are typically focused on Northern Pike spearing. A standard survey was conducted in 2022 to assess the current fish community. Partial winterkill events since the last survey have likely claimed some of the larger sunfish, bass, and Walleye in Lake Johanna. The fish community was dominated by Northern Pike, sunfish, and bullheads during the 2022 survey. Northern Pike abundance is near the long term average for Lake Johanna and almost half of the pike caught in the survey were over 26 inches long. Brown Bullhead and Yellow Bullhead catch rates were high and many of these fish were large. Compared to other species in the lake, Northern Pike and bullheads are more tolerant of low oxygen levels during winterkill events and this is why they are often more abundant and larger than other species in the lake. Bluegill numbers were the highest ever observed in Lake Johanna, but a majority of the fish were less than 6 inches and only 2 years old. Largemouth Bass numbers were moderate and the largest fish observed was 17 inches. Black Crappie abundance is also low and many of the fish were small at the time of the survey. Walleye abundance continues to decline, despite continued stocking efforts. Fish growth rates in Lake Johanna are fast, and in the absence of continued winterkill events, many species should reach larger sizes in just a few years. Lake Johanna is not currently known to have any invasive species. Recreational users should take necessary precautions to prevent the spread of invasive species. Drain all water and remove all aquatic vegetation from your boat and trailer when leaving any body of water.

What is the average air temp for Lake Johanna?

Are there any state parks near Lake Johanna?