Lake Koshkonong and Rock River Basin provides an ideal playground for water sport enthusiasts and has long been one of Southern Wisconsin’s best kept secrets. Sprawled across southern Wisconsin, just a few miles down the Rock River from Fort Atkinson, Lake Koshkonong is a fantastic place to boat and fish.
The lake has a rich history, plentiful wildlife and thousands of acres of beautiful water to draw visitors from all over. Formed by the construction of the Indianford Dam in 1846, Lake Koshkonong is a large shallow lake with a maximum depth of only seven feet. It is an impoundment of the Rock River which makes up both the inflow and outflow of the lake. The lake stretches across parts of Dane, Jefferson, and Rock Counties in southern Wisconsin.
Motor trolling is permitted on Lake Koshkonong.
- Hook and line fishing is open all year for all fish species except muskellunge, lake sturgeon, trout, paddlefish and threatened or endangered fish.
- Please note that the special regulations above may be revised at any time by the Wisconsin Department of Natural Resources without notice. For complete fishing regulations check with your local DNR.
Fish Species Present:
- Bluegill
- Lake Sturgeon
- Largemouth Bass
- Muskellunge (Muskie)
- Northern Pike
- Smallmouth Bass
- Tiger Muskellunge (Tiger Muskie)
- Walleye
Lake Size: 10,464 Acres
Fishing Species: Walleye, Northern Pike, Muskie, Bluegill, Crappie, Largemouth Bass, Smallmouth Bass
Lake Access: East shore off Hwy. 59 & N. Charley Bluff Rd., 1 on Rock River off Co. Rd. M & N Kidder Rd.
Lake Notes: Maximum depth of 12 ft.
Fishing Guide
DNR Fishing Map of Lake Koshkonong
[hr]Rock River and Lake Koshkonong Fishing Links
