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State park lake

Forbes Lake

Marion County, Illinois

Forbes Lake is a 585 acre reservoir inside Stephen A. Forbes State Park, about 13 miles northeast of Salem in Marion County. It was built in 1963 and is known for bluegill, catfish and bass.

N1 mi
Air temp Loading current temperature…
Map data © OpenStreetMap contributors.
Surface area525 acres
Max depth31 ft
Shoreline18 mi
Boat motorsCheck local rules

Species

Fishery rating out of 5.

Channel Catfish●●●●○

Most run 1 to 5 pounds, some over 8

Bluegill●●●●○

Most fish are 5 to 7 inches

Largemouth Bass●●●○○

Most bass over 14 inches weigh 1.3 to 4 pounds

Saugeye●●●○○

Stocked yearly

Crappie●●●○○

White crappie are plentiful but small

Wiper●●●○○

Most over 17 inches weigh 2 to 6 pounds

Boat launches

2 launch sites. Fees and hours change, so confirm before you go.

  • Forbes State Park boat rampsRamp
    Public boat ramps inside the state park. Handicap access available.Directions ↗
  • More public accessPublic
    See the IDNR or lake website for all ramps and feesDirections ↗

Size & creel limits

Special rules for this lake, confirmed from official state regulations. Minimum size and daily limit.

SpeciesMin sizeDaily limit
Largemouth Bass
Applies to largemouth and smallmouth
14 in6 / day
Smallmouth Bass14 in6 / day
Channel CatfishSee Illinois rules book ↗6 / day
Striped Bass
Also applies to white and hybrid striped bass
17 in3 / day
Wiper17 in3 / day
Crappie
No daily limit, but no more than 10 fish 8 inches or longer
See Illinois rules book ↗

Other species in this lake: look up the limits at Illinois Department of Natural Resources ↗

Verified October 2026. Rules change, so confirm current limits with the Illinois Department of Natural Resources before you fish.

Bait & tackle nearby

No shops listed yet for this lake. Use the search link below.

Search more bait shops near Forbes Lake ↗

Local tips

  • Release crappie under 8 inches. The lake strongly encourages it.
  • Parts of the lake are a waterfowl refuge or hunting area, so check posted areas.
  • Bass must be 14 inches or longer to keep.

View on interactive map

Zoom and pan on a street, satellite or terrain map. Red pins are boat launches.

More Illinois lakes

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Always wear a life jacket and check your state's current regulations before you fish.