Bass lake, Sunfish lake, Trout lake

Duncan Lake

Lake-specific eating advice

Duncan Lake is a 477-acre lake in Cook County, 130 feet at its deepest. The DNR last surveyed its fish in 2025. Recorded species include smallmouth bass and trout.

Details

DNR lake ID
16023200
County
Cook
Surface area
477 acres
Maximum depth
130 feet
Mean depth
47 feet
Shallow water (littoral) area
148 acres, 31% of the lake
Shoreline
7.6 miles
Average water clarity
17.8 feet (Secchi disk, 4 readings)
Latest DNR fish survey
August 2025, targeted survey
Surveys on record
7, since 1993
Fish species recorded
green sunfish, lake trout, smallmouth bass, yellow perch, and 3 other species
Eating advice, general populations
lake trout: shorter than 27" - 1 serving/week; lake trout: 27" or longer - 1 serving/month
Size
100 to 499 acres
Deepest point
60 feet or more
Lake-specific eating advice
Yes

Sources

Survey catches show what DNR nets and electrofishing found on the survey date, not how the fishing is today. Check the current regulations and the Department of Health advice before you keep fish, and confirm access conditions before you tow a boat.

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