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LaSalle Cooling Lake will be closed for the season October 15.

Lake Information

County: LaSalle

Acreage: 2058

Average Depth: 15.42 feet

Shoreline Length: 20.8 miles

Recreational Amenities

Boat Fishing? Unrestricted

Boat Ramps? Yes

Boat Rental? No

Skiing? No

Swimming? No

Picnicking? No

Camping? No

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There are zebra mussels in this lake.

Lake Status Summary  ( Full PDF Report )

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Fish Status



Blue catfish are one of the most popular fish at LaSalle Lake. The dominate size group is 12–30 inches, weighing 1.0- 3.0 pounds. Large blue catfish are commonly reported. There is a high potential for trophy-sized blue catfish in LaSalle Lake.



Bluegill do very well in the rip-rap that lines the entire shoreline of LaSalle Lake. The east wall in the intake pool is a hot spot for fishing.



Channel catfish average 1.0-2.0 pounds.



Hybrid striped bass are stocked annually. Anglers report good catches of 2 to 8 pound fish, especially early spring and late fall.



Largemouth bass have been rebounding from previous years. Largemouth fish can be very tough post the shad spawn. Hot spots in the spring before the shad spawn are the East end banks with drop off near large rock.

Location: LaSalle Lake State Fish and Wildlife Area, is located in LaSalle County approximately 8 miles southeast of Marseilles or 8 miles southwest of Seneca on County Road 6. Anglers can use the following number for updates on lake conditions as it impacts boat fishing: call 815-357-1608.

Description: LaSalle Lake is a perched cooling lake impounding 2,058 surface cooling acres of water with 100 percent of the shoreline comprised of rock rip–rapped dikes. The average depth of the lake is 15 feet, but there are excavated areas within the lake up to 70 feet deep. Caution should be used on windy days as LaSalle Lake may become extremely rough. For safety, please observe wind warning lights. There is usually a 20 degree water temperature difference between the discharge and the intake.

There is a no horsepower limitation for boats; the maximum speed is 40 mph except in designated “no wake” areas; a working gasoline engine is required as the main propulsion unit; boats under 14 feet are not recommended. The lake has three concrete boat ramps and a paved parking lot large enough for 140 car/trailer parking. The boat launch is ADA accessible. Zebra mussels have been found in LaSalle Lake, therefore boaters should take appropriate measures upon departure to prevent spreading.

History and Status of the Sport Fishery: The fishery is managed by annual species-specific surveys and stocking. LaSalle Lake receives an annual stocking of largemouth bass, smallmouth bass, hybrid striped bass, and blue catfish.

Additional Lake Information: Anglers can use the following number for updates on lake conditions as it impacts boat fishing. The number to call is 815-357-1608.

The Lake is scheduled to open on March 15th each year. Hours are from 6:00 AM to sunset seven days a week. The lake closes on October 15.

Site Regulations:
2 pole and line fishing only.
Large or smallmouth bass: 1 fish daily limit; 18" minimum length limit
Striped, white, or hybrid striped bass: 10 fish daily limit with no more than 3 fish greater than or equal to 17"

Contact Information:
Illini State Park
IDNR Fisheries Biologist, David Wyffels