Heidecke Lake Fishing
A lake in Grundy County, 1,955 acres by IDNR.
Pick for catfishPiscifun LumiCat II catfish rod48% OFFSale $114.99 Photo of Illinois River: Richie Diesterheft, CC BY-SA 2.0
Sizing up Heidecke Lake
Look for Heidecke Lake in Grundy County: a lake that IDNR sizes at 1,955 acres. Morris lies roughly 4 miles off, the handiest Census place.
Boaters get 1 boat ramp from the IDNR map. Shore anglers can use 1 fishing pier on the asset list. Its limits differ from the statewide table in places.
Acres as listed on the IDNR IFishIllinois page (printed only where the page text gives the same size); depth only where the IDNR text states a maximum depth. IDNR IFishIllinois waterbody page, ifishillinois.org, read November 4, 2026. Census 2023 places.
From the IFishIllinois page on Heidecke Lake
- Location (IDNR)Heidecke Lake State Fish and Wildlife Area is located in Grundy County approximately 1 mile south and 8 miles east of Morris, between Illinois Route 47 and Interstate Route 55 on Lorenzo/Pine Bluff Road.
- Description (IDNR)Formerly a cooling reservoir, Heidecke Lake has 1,955 surface acres of water with 75% of shoreline comprised of rock rip-rapped dikes. A "safe harbor" created by breakwaters was constructed in 1993. There are no horsepower limitations; maximum speed is 40 mph except in designated "no wake" areas; working gasoline engine required as main propulsion unit; boats under 14' are not recommended. A recently …
- More from IDNRZebra Mussels have been found in Heidecke Lake and boaters should take appropriate measures upon departure.
Amenities on the IDNR page for Heidecke Lake
- Family FriendlyNo
- Handicap AccessYes
- Boat FishingYes – Unrestricted
- Boat RampsYes
- Boat RentalsNo
- CampingNo
- PicnickingYes
- SkiingNo
- SwimmingNo
- Trout StockingNo
The rows above quote the IDNR page for Heidecke Lake.
IDNR IFishIllinois waterbody page, ifishillinois.org, read November 4, 2026.
IDNR survey ratings for Heidecke Lake
| Species | IDNR rating | IDNR survey note |
|---|---|---|
| Channel Catfish | Poor | Channel Catfish have not been collected in any large numbers for quite a few years, possibly due to recruitment issues. |
| Smallmouth Bass | Very Good | The fall 2024 survey resulted in a total of 204 Smallmouth Bass collected ranging from 80 mm (3.1 inches) to 475 mm (18.7 inches), with 188 of those fish greater than Stock size (7.0 inches). Average length was 345 mm… |
| Crappie spp. | Very Good | The Spring 2025 Muskie trap netting survey resulted in a total of 43 Black Crappie collected ranging from 185 mm (7.3 in) to 328 mm (12.9 in). Average length was 270 mm (10.6 in). The Fall 2025 Crappie trap netting… |
| Striped Bass x White Bass (Wiper) | Good | The fall 2024 survey resulted in a total of 128 Hybrid Striped Bass collected ranging from 84 mm (3.3 inches) to 636 mm (25 inches), with 116 of those fish greater than Stock size (8.0 inches). Average length was 473 mm… |
| White Bass | Good | White Bass were essentially absent from the fall 2024 survey though this is not indicative of the population. |
| Walleye | Very Good | The spring 2024 trap netting survey resulted in a total of 85 Walleye collected ranging from 383 mm (15.1 inches) to 693 mm (27.3 inches), with 85 of those fish greater than Stock size (10.0 inches). Average length was… |
| Muskellunge | Very Good | The Spring 2025 trap netting survey resulted in a collection of 81 fish ranging from 683 mm (26.9 in) to 1,193 (47.0 in). Average length was 922 mm (36.3 in). Male Muskies comprised 60.5% of the total catch and ranged… |
| Yellow Bass | Good | The fall 2024 survey resulted in a total of 17 Yellow Bass collected ranging from 90 mm (3.5 inches) to 266 mm (10.5 inches), with 15 of those fish greater than Stock size (4.0 inches). Average length was 213 mm (8.4… |
| Bluegill | Good | The Fall 2024 survey resulted in a total of 547 Bluegill collected ranging from 30 mm (1.2 inches) to 223 mm (8.8 inches), with 226 of those fish greater than stock size of 3.0 inches. Average length was 95 mm (3.7… |
| Largemouth Bass | Poor | The fall 2024 survey resulted in a total of 68 Largemouth Bass collected ranging from 58 mm (2.3 inches) to 465 mm (18.3 inches), with 25 of those fish greater than Stock size (8.0 inches). Average length was 216 mm… |
The best IDNR grade at Heidecke Lake goes to smallmouth bass: very good.
Each species named here comes from the IDNR page, the stocking table or the record list for Heidecke Lake; it is not a creel count.
IDNR fishing outlook ratings and survey notes as printed on the IFishIllinois page, read November 4, 2026. IDNR fish stocking table on ifishillinois.org (year, water, species, size class and number as listed; no stocking dates published), read November 4, 2026; IDNR Illinois state record fish list (keeper: Illinois Department of Natural Resources; no angler names printed), read November 4, 2026.
For the catfish herePiscifun Chaos XS round baitcaster36% OFFSale $57.99 What past IDNR work found at Heidecke Lake
- IDNRThe fishery is evaluated via biennial major surveys and annual species-specific surveys. Attempts to introduce aquatic vegetation have generally failed. Bass spawning habitat has been installed at various locations and other habitat enhancement projects are planned. Heidecke Lake receives annual stockings of Walleye and Hybrid Striped Bass. Pure Muskellunge are stocked every third year, while Black Crappie and …
IDNR fishery history text, ifishillinois.org, read November 4, 2026.
Concrete and gravel ramps on Heidecke Lake
- Heidecke Lake South Side Main Boat Ramplaunch, Ramp inside of breakwall
Bank fishing spots on Heidecke Lake
- Bankfishing Fishing Pier on Heidecke Lakefishing pier, IDNR site: Heidecke Lake
Other ramps when Heidecke Lake is crowded
- Illinois River – Marseilles Stratton Park Boat Ramp, Morris on Gebhard Woods Ponds 1-3Gebhard Woods Ponds 1-3, 4 miles west
- Kankakee River Conservation Area Boat Ramp on Lake MillikenLake Milliken, 7 miles east
- Des Plaines River Big Basin Marina Boat RampDes Plaines River, 9 miles northeast
- Lake Chaminwood Carry-in Boat LaunchLake Chaminwood, 10 miles northeast
- Mazonia – Monster Lake Boat RampMonster Lake (Mazonia), 14 miles southeast
- Mazonia – Eagle Lake Boat RampEagle Lake (Mazonia), 15 miles southeast
IDNR IFishIllinois map, boat ramp and launch layer of October 2025 (KML; name, waterbody and notes as printed), read November 5, 2026.
IDNR lands asset inventory, 2019 (boating and fishing assets layer), read November 4, 2026.
Tie-up docks and fillet stations at Heidecke Lake
- 1 West Boat Dockboat dock, near Heidecke Lake
- 2 West Boat Dockboat dock, near Heidecke Lake
- 3 West Boat Dockboat dock, near Heidecke Lake
- 4Th From West Boat Dockboat dock, near Heidecke Lake
- 2Nd From East Boat Dockboat dock, near Heidecke Lake
- Eastmost Boat Dockboat dock, near Heidecke Lake
These Heidecke Lake entries are IDNR assets as inventoried in 2019, not a current service list.
IDNR lands asset inventory, 2019 (boating and fishing assets layer), read November 4, 2026.
Mapped depths at Heidecke Lake
- Heidecke LakeIDNR depth map
Find 1 depth map of Heidecke Lake on IFishIllinois.
IDNR depth map list, ifishillinois.org, read November 4, 2026.
Fingerlings and adults IDNR added to Heidecke Lake
| Year | Species as listed | Number | Size class |
|---|---|---|---|
| 2026 | Striped Bass x White Bass (Wiper) | 17,377 | Fingerling (1 – 3") |
| 2026 | Walleye | 105,682 | Fingerling (1 – 3") |
| 2025 | Muskellunge | 1,959 | Adult |
| 2025 | Striped Bass x White Bass (Wiper) | 21,232 | Fingerling (1 – 3") |
| 2025 | Walleye | 102,815 | Fingerling (1 – 3") |
| 2024 | Blacknose Crappie | 45,021 | Fingerling (1 – 3") |
| 2024 | Blue Catfish | 268 | Adult |
| 2024 | Striped Bass x White Bass (Wiper) | 19,775 | Fingerling (1 – 3") |
| 2024 | Walleye | 118,585 | Fingerling (1 – 3") |
| 2023 | Blacknose Crappie | 8,673 | Fingerling (1 – 3") |
| 2023 | Striped Bass x White Bass (Wiper) | 20,385 | Fingerling (1 – 3") |
| 2023 | Walleye | 65,631 | Fingerling (1 – 3") |
IDNR records these Heidecke Lake stockings by year only.
IDNR fish stocking table on ifishillinois.org (year, water, species, size class and number as listed; no stocking dates published), read November 4, 2026.
Bag and length rules posted at Heidecke Lake
| Species group | Daily limit | Statewide rule as printed |
|---|---|---|
| Alligator Gar | 1 per 24 hours | Harvest limit is 1 Alligator Gar per 24 hours. |
| Blue, Channel, and Flathead Catfish | no limit | There are no daily harvest or size limits, except as specified under Site Specific Regulations. |
| Bluegill, Redear Sunfish, Other Sunfish | no limit | There are no harvest or size limits, except as specified under Site Specific Regulations. |
| Crappie (White, Black or Hybrid Crappie) | no limit | There are no daily harvest or size limits, except as specified under Site Specific Regulations. |
| Lake Sturgeon | no possession | Protected; No possession. |
| Largemouth Bass, Smallmouth Bass, Spotted Bass | 6 (combined) | Daily harvest limit is 6 Bass, either singly or in the aggregate, except as specified under Site Specific Regulations. In rivers and streams and their tributaries statewide, except for the Mississippi, Ohio (including Golconda Marina), and Wabash Rivers, the d |
| Muskellunge, Northern Pike, and their Hybrid | muskellunge 1, northern pike 3 | All Muskellunge and Muskellunge hybrids (Tiger Muskie) taken must be 36" in total length or longer, except as specified under Site Specific Regulations. No more than 1 Muskellunge or Muskellunge hybrid (Tiger Muskie) may be taken per day, except as specified u |
| Paddlefish | 2 | Daily harvest limit is 2 Paddlefish. Please refer to Site Specific Regulations for the Mississippi River between Illinois and Iowa and the Mississippi River between Illinois and Missouri. |
| Striped Bass (Ocean Rockfish), White Bass, Yellow Bass, and their Hybrids | no limit under 17 inches; 3 at 17 inches or longer | There are no daily harvest limits or minimum size limits for Striped Bass (Ocean Rockfish), White Bass, Yellow Bass, and their hybrids, which are less than 17" in total length, except as specified under Site Specific Regulations. For these fish 17" in total le |
| Trout and Salmon | 5 (combined) | Daily harvest limit is 5 trout or salmon, either singly or in the aggregate. |
| Walleye, Sauger, or their Hybrid | 6 (combined) | All Walleye, Sauger, or their hybrid (Saugeye) taken must be 14" in total length or longer, except in the Mississippi River, Wabash River, or except as specified under Site Specific Regulations. Daily harvest limit is 6 Walleye, Sauger, or their hybrid, either |
At Heidecke Lake a site-specific digest line beats the statewide row.
Local digest rules for Heidecke Lake
| Water as printed | Species | Rule as printed (code) |
|---|---|---|
| Heidecke Lake | Recreational Use Restrictions | Waterfowl Refuge or Hunting Area (13) |
| Heidecke Lake | All Fish | 2 Pole and Line Fishing Only (1). All live bait greater than 8 inches must be rigged with a quick set rig (4) |
| Heidecke Lake | Channel Catfish | 6 Fish Daily Harvest Limit |
| Heidecke Lake | Large or Smallmouth Bass | 15 inch Minimum Length Limit; 3 Fish Daily Harvest Limit |
| Heidecke Lake | Pure Muskellunge | 48 inch Minimum Length Limit |
| Heidecke Lake | Striped, White, or Hybrid Striped Bass | 10 Fish Daily Harvest Limit with no more than 3 Fish greater than or equal to 17 inches |
| Heidecke Lake | Walleye, Sauger, or Hybrid Walleye | 16 inch Minimum Length Limit; 3 Fish Daily Harvest Limit |
| Heidecke Lake | White, Black, or Hybrid Crappie | 15 Fish Daily Harvest Limit |
- Code 1Sport fishermen must not use more than 2 poles and each pole must not have more than 2 hooks or lures attached (Alabama rigs not allowed) while fishing, except that legal size cast nets (in accordance with Section 810.50(a)(2)), shad scoops, and minnow …
- Code 4When using live bait, all live bait in excess of 8" in total length shall be rigged with a quick set rig. The hook shall be immediately set upon the strike. A quick set rig is defined as follows: a live bait rig with up to 2 treble hooks attached …
- Code 13It shall be unlawful to enter upon areas designated as waterfowl hunting areas during the 10 days prior to the start of the regular duck season, or to fish on such areas during the regular duck season except in areas posted as open to fishing. It shall …
Site-specific regulations as printed in the 2026 Illinois Fishing Information digest (IDNR) page 31, read November 4, 2026.
Anglers 16 and older carry an Illinois fishing license ($15 a year for residents, $31.50 for nonresidents in 2026).
IDNR 2026 Illinois Fishing Information digest (IDNR), read November 4, 2026. IDNR license fees (ifishillinois.org), read November 4, 2026.
Heidecke Lake set beside other downstate lakes
I & M Canal covers the most water in this group: 164 acres by IDNR.
| Lake | Distance | Acres (IDNR) | Max depth (ft) | Mapped ramps | First IDNR-rated fish |
|---|---|---|---|---|---|
| Heidecke Lake | 1,955 | 1 | Channel Catfish | ||
| Gebhard Woods Ponds 1-3 | 5 miles west | 2.0 | 1 | ||
| I & M Canal | 8 miles northeast | 164 | 2 | Flathead Catfish | |
| Lake Milliken | 9 miles east | 25 | 8 | 1 | Black Crappie |
| Lake Chaminwood | 10 miles northeast | 48 | 10 | 2 | Largemouth Bass |
| North Unit Lakes (Mazonia SFWA) | 12 miles south | not printed | 0 |
IDNR IFishIllinois pages (acres, depth text, outlook) and the IDNR boat ramp layer; read November 4, 2026.
Around the Heidecke Lake shoreline
Other lakes an Illinois Tollway exit or two from Heidecke Lake
- Gebhard Woods Ponds 1-35 miles west
- I & M Canal8 miles northeast
- Lake Milliken9 miles east
- Lake Chaminwood10 miles northeast
- North Unit Lakes (Mazonia SFWA)12 miles south
Buy bait on the way to Heidecke Lake
- Bedford Sales & Outdoorsbait and tackle shop, Morris, 5 miles
- Harborside Marinamarina, Wilmington, 5 miles
- Three Rivers Marine Servicemarina, Wilmington, 6 miles
- Big Basin Marina Incmarina, Channahon, 9 miles
- Angelos Outdoor Sports Centersporting goods store, Wilmington, 11 miles
- Strictly Fishingbait and tackle shop, Shorewood, 12 miles
IDNR loaner tackle close to Heidecke Lake
- I & M Canal State Trail Gebhard WoodsMorris, 5 miles
- Joliet Park DistrictJoliet, 20 miles
- New Lenox Community Park DistrictNew Lenox, 21 miles
- City of Plano-Village HallPlano, 22 miles
Prairie State towns that sit near Heidecke Lake
- Morris4 miles
- Channahon5 miles
- Minooka6 miles
Illinois counties along Heidecke Lake
- Grundy Countyseat: Morris
IDNR IFishIllinois map, tackle loaner site layer (KML), read November 5, 2026.
Piscifun picks ahead of a trip to Heidecke Lake
Piscifun and Amazon links are affiliate links; the site earns a commission on qualifying purchases.
A photo field guide to Heidecke Lake fish
Photo: USFWS Mountain-Prairie, Public domain
Photo: Yellowstone National Park, Public domain
Photo: USFWS Mountain-Prairie, Public domain
Photo: Richard Hurd, CC BY 2.0
Heidecke Lake: what Prairie State anglers want settled
Which Illinois county is Heidecke Lake in?
Heidecke Lake State Fish and Wildlife Area is located in Grundy County approximately 1 mile south and 8 miles east of Morris, between Illinois Route 47 and Interstate Route 55 on Lorenzo/Pine Bluff Road. You will find it in Grundy County, about 4 miles from Morris.
How much surface does Heidecke Lake have by IDNR count?
The IFishIllinois figure is 1,955 acres.
How many IDNR-mapped ramps touch Heidecke Lake?
IDNR shows just Heidecke Lake South Side Main Boat Ramp.
What does IDNR say is biting at Heidecke Lake?
IDNR rates channel catfish as poor; smallmouth bass, hybrid striped bass, white bass, walleye and muskellunge also appear in its sources.
Does Heidecke Lake have special regulations?
Statewide digest row for Largemouth Bass, Smallmouth Bass, Spotted Bass: Daily harvest limit is 6 Bass, either singly or in the aggregate, except as specified under Site Specific Regulations. The same row adds a separate rule for rivers and streams, quoted in the limits band. Its own digest entry sits in the limits band too.
Does a visitor need a license at Heidecke Lake?
Anglers 16 and older carry an Illinois fishing license ($15 a year for residents, $31.50 for nonresidents in 2026).
Can a bank caster do well at Heidecke Lake?
Try Bankfishing Fishing Pier on Heidecke Lake, one of 1 fishing pier.
Which Illinois tackle counter is nearest Heidecke Lake?
Bedford Sales & Outdoors, about 5 miles away, tops the shop list.
Take the county blacktop out to Heidecke Lake
Every 2026 fee and limit is a click away.