Because of a comprehensive fish-stocking program, Heidecke Lake has a good fish population producing trophy-size bass. Only pole-and-line fishing is permitted, with each angler limited to using two poles. There are no fishing fees, but each angler must have a valid Illinois fishing license unless exempted by law.

Fish are measured while positioned flat on a ruler from the tip of the mouth when closed to the tip of the tail when compressed. All sub-legal-size fish must be released immediately after being caught to maximize their chance for survival.

Catch-and-release fishing is encouraged for anglers who catch legal-size fish but don't want to keep them. Anglers should handle fish with care and release them immediately after catching so the fish can survive to later provide other anglers similar recreation.

• Channel Catfish
• Bluegill
• Crappie
• Striped Bass
• Walleye