Lake Koshkonong is a lake in Wisconsin, near Jefferson County.
On paper, Lake Koshkonong is about 10,595 acres and tops out near 7 feet deep, so I would focus on a small part of it and let the day build from there. Lake Koshkonong is a natural widening of the Rock River. It spreads across roughly 10,000 acres but reaches only about seven feet at maximum depth, making wind and current major fishing factors. On day one at Lake Koshkonong, I would stick with one part of the lake long enough to understand what is happening there.
| County | Jefferson County, WI |
|---|---|
| Water type | Lake |
| Surface area | 10,595 acres |
| Maximum depth | 7 feet |
| Recorded fish | 10 |
I would make the first trip about learning the water, not conquering it with a simple look at one manageable section of the lake instead of trying to cover the whole thing and I would only make a big move if those places truly look empty.
For this exact water, the recorded fish are Black Crappie, Bluegill, Channel Catfish, Largemouth Bass, Muskellunge, Northern Pike, Pumpkinseed, and Smallmouth Bass, plus 2 more; so the first trip would at least account for weeds, wood, rock, or docks for bass and points, breaks, and wind-pushed edges for walleye, and avoid hauling gear for every fish in Wisconsin.
If a buddy asked me how to start on Lake Koshkonong, I would start with obvious fish-holding water and let actual bites tell me whether to stay or move, and I would make sure the current Wisconsin fishing regulations do not add a special rule for this water.
Koshkonong is a broad natural widening of the Rock River. The current record lists about 10,595 acres but only around 7 feet at maximum depth.
Yes. Koshkonong is part of the Rock River system, which is why current and river conditions are more important here than on a closed inland lake.
There is very little deep water and a huge amount of open surface. Wind can move water, stir the bottom, and change clarity across large parts of the lake.
No. The current fish record also includes muskellunge, northern pike, and other larger game fish, so the shallow depth does not mean the fishery is simple.
Explore nearby waters, including local Featured destinations. Check each page for access and fishing restrictions.
Distances are straight-line estimates between mapped water locations.
Source dates describe the evidence, not a live catch forecast. Check the managing authority before planning access or keeping fish.
The linked source supports this fish’s presence or stocking in this water.
Source checked:
This is not a record catch or a measure of how many fish are there today. The source may describe an earlier period.
The linked source supports this fish’s presence or stocking in this water.
Source checked:
This is not a record catch or a measure of how many fish are there today. The source may describe an earlier period.
The linked source supports this fish’s presence or stocking in this water.
Source checked:
This is not a record catch or a measure of how many fish are there today. The source may describe an earlier period.
The linked source supports this fish’s presence or stocking in this water.
Source checked:
This is not a record catch or a measure of how many fish are there today. The source may describe an earlier period.
The linked source supports this fish’s presence or stocking in this water.
Source checked:
This is not a record catch or a measure of how many fish are there today. The source may describe an earlier period.
The linked source supports this fish’s presence or stocking in this water.
Source checked:
This is not a record catch or a measure of how many fish are there today. The source may describe an earlier period.
The linked source supports this fish’s presence or stocking in this water.
Source checked:
This is not a record catch or a measure of how many fish are there today. The source may describe an earlier period.
The linked source supports this fish’s presence or stocking in this water.
Source checked:
This is not a record catch or a measure of how many fish are there today. The source may describe an earlier period.
The linked source supports this fish’s presence or stocking in this water.
Source checked:
This is not a record catch or a measure of how many fish are there today. The source may describe an earlier period.
The linked source supports this fish’s presence or stocking in this water.
Source checked:
This is not a record catch or a measure of how many fish are there today. The source may describe an earlier period.