Contour map · Grundy County, Illinois
Heidecke Lake
25 ftdeepest spot
1,899acres
5 ftcontour lines
What you get on Heidecke Lake
- Every drop-off on a full contour map, lines every 5 ft, from the Illinois Dept. of Conservation (now IDNR) / Illinois Natural History Survey.
- Drop a pin anywhere and see the depth under it.
- Riggs tells you where to fish and what to throw today, from the weather, water temp, likely species and the odds.
- Follow My Boat (Pro) shows the depth under your boat as you move.
Free to download. A free pick every day; contour maps with Pro or Guide.
Heidecke Lake at a glance
| Location | Grundy County, Illinois |
|---|---|
| Size | 1,899 acres |
| Deepest spot | 25 ft |
| Average depth | 9 ft |
| Contour lines | every 5 ft |
| Survey | Illinois Dept. of Conservation (now IDNR) / Illinois Natural History Survey |
Boat ramps and marinas on Heidecke Lake
1 boat ramp.
In the app, every one is on the map, next to the contour lines.
Ramp and marina locations © OpenStreetMap contributors (ODbL).
Lakes near Heidecke Lake
- Illinois River – Marseilles Pool9.2 mi
- Illinois River – Dresden Island Pool9.5 mi
- Monster Lake14 mi
- Big Lake20 mi
- Illinois River – Starved Rock Pool26 mi
- Goose Lake East27 mi
Contour map: Illinois Dept. of Conservation (now IDNR) / Illinois Natural History Survey. Rigology shows the agency's survey and is not affiliated with it.