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Lake Information

County: Tazewell

Acreage: 10

Shoreline Length: 0.6 miles

Recreational Amenities

Boat Fishing? Electric Motors only

Boat Ramps? Yes

Boat Rental? No

Skiing? No

Swimming? No

Picnicking? Yes

Camping? No

There are no zebra mussels in this lake.



Fish Status



The current crappie population is primarily made up of individuals ranging from 9 - 11 inches in good body condition.



The bluegill population was sampled by 30 fish in the fall 2019 electrofishing survey. They ranged in size from 1 to 8.7 inches in length with an average body condition rating of 94. The current bluegill population is rated as very good. A future improvement in the bass population size structure as well as some aquatic vegetation management will help maintain this good bluegill size structure.



The channel catfish population was evaluated by 3 catfish ranging from 18 – 21 inches. They had a relative weight value of 99. IDNR will add Brock Lake to the channel catfish stocking schedule starting in 2020.



In 2019, the largemouth bass population was evaluated by 102 bass collected by Pulsed-DC electrofishing. The largemouth bass population appears to be defined by a high percentage of fish from 5 – 12 inches with body condition of 89. We did not collect any bass over 13 inches. The collection rate was 204/hr which indicates a high density.

Location: Brock Lake is located 1.2 miles west of Mackinaw, IL at 29550 E. Hoffman Rd. Mackinaw, IL 61755. The lake is the property of the Village of Mackinaw.

Description: Brock lake is 10 acres in size. Approx. 0.3 miles of shoreline is accessible to bank fisherman. This lake was enrolled into a fisheries Co-Op agreement with IDNR in 2019.

Contact Information:
Village of Mackinaw
309- 359-5821
IDNR Fisheries Biologist: Blake Bushman
309- 435-1010