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Heidecke Lake

Boat Ramps
1
Access Points
1
Species
16

Heidecke Lake is a premier fishing destination located in Grundy County, Illinois, approximately 8 miles east of Morris. Originally constructed as a cooling reservoir for the Collins Power Plant, this 1,955-acre lake has transformed into one of northeastern Illinois' most diverse fisheries. With 17 miles of shoreline, predominantly comprised of rock rip-rapped dikes, Heidecke offers anglers a unique fishing experience. The lake has an average depth of 9 feet and features a safe harbor created by breakwaters constructed in 1993. Since the power plant's decommissioning in 2004, the lake's fishery has stabilized without the thermal variations that often affect cooling lakes. Now managed by the Illinois Department of Natural Resources, Heidecke Lake has become a popular destination for Chicago-area anglers seeking trophy-sized fish in a variety of species.

Fish stocking schedule

Latest 5 stockings

  • Walleye105,682 fish · 2.0 in2026
  • Striped Bass X White Bass (wiper)17,377 fish · 2.0 in2026
  • Walleye102,815 fish · 2.0 in2025
  • Striped Bass X White Bass (wiper)21,232 fish · 2.0 in2025
  • Muskellunge1,959 fish · Adults2025

Source

Illinois Department of Natural Resources

Updated Nov 13, 2026. Sizes are the length the agency reports. Dates are as precise as the agency reports them.

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Fishing spots, boat ramps & amenities

Learn how to get on Heidecke Lake. Uncover great fishing access points, boat ramps, and all the facilities you need for an unforgettable day on the water. Some locations shown may border or include private property. Always check property boundaries and applicable regulations before visiting. onWater's Public & Private Land layer can help you plan your access with confidence.

Kayak Morris Campground

Kayak Morris Campground

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Know where you can legally fish on Heidecke Lake

See public and private land boundaries along the water, turn on private parcels with owner details to know where permission is required, and find land-trust parcels that offer permitted fishing access.

Illinois licenses and regulations

Illinois Boating Regulations

When using any type of watercraft to access a body of water, it is important to follow all federal, state, and local rules and regulations. These rules and regulations include boat permitting and licensing, invasive species inspections and stamps, life jacket and PFD rules, motor size and horsepower restrictions, noise limitations, restrictions on personal watercraft, and many more. Visit the web link below for the most current rules and regulations for this body of water.

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Illinois Fishing License

All individuals who are 16 and over are required to have a fishing license. All youth who are below 16 may fish without a license.

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Illinois Fishing Regulations

This river has a variety of species and regulations, including potential floating and/or watercraft restrictions. Because this river is specially managed for species, seasons, angling methods, and watercraft, it is strongly encouraged you check all federal, state, and local regulations before fishing. Visit any of the links below, inquire locally, or contact a local fly shop to learn current regulations and restrictions.

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Illinois Steam Access Laws

If the waterway is navigable in fact and the streambed is publicly owned, it is most likely fully accessible. If the streambed is privately owned, it is only accessible for navigation, not for hunting, fishing or portage.

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Take Heidecke Lake with you

The onWater Fish app keeps this water's access points, species and conditions in your pocket, with the tools you use once you're there.

  • Use the map without signal

    Download the map around Heidecke Lake to use it offline when coverage drops.

  • Log your catches here

    Keep a private fishing journal for Heidecke Lake to find where and when fish are biting for you.

  • HD depth charts from Garmin

    Find drop offs, ledges, channels, points and shallow flats with Garmin depth charts in the app.

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Water and weather conditions (10 day forecast)

See the best times to fish Heidecke Lake and check the forecast before you go.

No forecast data available.

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