East Fork Lake

Info / Richland County

Location 935 acres

East Fork Lake is located in Richland County, approximately 1 mile north of Olney Illinois.

Fishing Outlook

Recent Stocking History
2025 Channel Catfish Advanced Fingerling (4 - 7") 20000
2025 Walleye Fingerling (1 - 3") 53983
2024 Walleye Fingerling (1 - 3") 32816

Contact

Olney City Hall:
618-393-2130
La Hood, Boone
IDNR Fisheries Biologist
Send Message
618-393-6732

Description

East Fork Lake was constructed by the City of Olney in 1971 to serve as a water supply reservoir. The lake has a surface area of 935 acres, a maximum depth of 40 feet, and a mean depth of 15 feet. The lake has 25 miles of shoreline and a watershed of 9,982 acres.

Fishery History

The sport fish population in East Fork Lake is comprised primarily of Largemouth Bass, Bluegill, Redear Sunfish, White and Black Crappie, Channel Catfish, and is stocked annually with Walleye. The lake also contains Common Carp, Bowfin, and large Yellow Bullhead. The fish population is surveyed annually.

Site Regulations

Annual City of Olney Boat Stickers and Tournament Permits are Required. Boat stickers are available at Olney City Hall and local bait shops. Tournament permits are available at Olney City Hall.

Site-Specific Fishing Regulations:

  • All Fish: 2 pole and line fishing only and each pole must not have more than 2 hooks or lures attached while fishing
  • Bluegill or Redear Sunfish: 25 Fish Daily Harvest Limit
  • Channel Catfish: 6 Fish Daily Harvest Limit
  • Large or Smallmouth Bass: 15 inch Minimum Length Limit; 6 Fish Daily Harvest Limit
  • White, Black or Hybrid Crappie: 25 Fish Daily Harvest Limit

Additional Information

Planning to eat your catch?  Fish Consumption Advisory information can be found here: Fish Consumption Advisory Page

An invasive aquatic plant species called Curly-leaf Pondweed (Potamogeton crispus) has been becoming more prevalent in East Fork Lake in recent years.  This plant begins growing in the winter, becomes very dense in late-spring to early-summer, and then dies off in mid-summer.  It displaces native species of vegetation and can spread very easily from small leaf fragments.  This invasive plant will likely continue to spread in East Fork Lake and may contribute to size structure declines for many species of fish.  The very dense stands of Curly-leaf Pondweed are difficult for many fish to effectively feed in.  Likewise, fish also struggle with feeding and habitat loss when the plants die off in the summer.  The primary purpose of East Fork Lake is to serve as a drinking water supply and most herbicide applications to treat Curly-leaf Pondweed are prohibited or not feasible.  Please wash and dry your boats, trailers, and fishing equipment after visiting East Fork Lake.  Curly-leaf Pondweed is difficult and expensive to control, and small pieces/leaf fragments can spread this highly invasive plant to other lakes.

Bath Map

Bath Map: East Fork Lake Bath Map:  East Fork Lake
East Fork Boat Ramp East Fork Boat Ramp
East Fork Dam East Fork Dam