Cooper

Cass County

Near Longville

DOW: 11016300

Black CrappieGood · 74Northern PikeGood · 69Hybrid SunfishGood · 69

A 133-acre lake near Longville in Cass County — best known for panfish and pike. Last surveyed 1987.

Fish Species (13)

Black Crappie

Good · 74

Typical numbers · large fish

Trap-net survey · surveyed Jul 1973

Last surveyed 1973 — treat with caution

Avg Weight

0.73 lbs

Catch rate: 2.6 per trap net · typical 0.8–4 for a lake like this

Survey History

Date	Catch Rate	Avg Length	Avg Weight	Gear
Jul 9, 1973	0.33	-	0.30 lbs	Standard gill nets
Jul 9, 1973	2.62	-	0.73 lbs	Standard trap nets

Northern Pike

Good · 69

Typical numbers · large fish

Gill-net survey · surveyed Jul 1987

Last surveyed 1987 — treat with caution

Avg Weight

3.16 lbs

Catch rate: 5.3 per gill net · typical 3.5–8.9 for a lake like this

Survey History

Date	Catch Rate	Avg Length	Avg Weight	Gear
Jul 6, 1987	5.33	-	3.16 lbs	Standard gill nets
Jul 9, 1973	2.33	-	3.33 lbs	Standard gill nets
Jul 9, 1973	0.25	-	3.85 lbs	Standard trap nets

Hybrid Sunfish

Good · 69

Typical numbers

Trap-net survey · surveyed Jul 1987

Last surveyed 1987 — treat with caution

Avg Weight

0.37 lbs

Catch rate: 1.0 per trap net

Survey History

Date	Catch Rate	Avg Length	Avg Weight	Gear
Jul 6, 1987	1.00	-	0.37 lbs	Standard trap nets

Pumpkinseed

Good · 68

Above-normal numbers · average-size fish

Trap-net survey · surveyed Jul 1987

Last surveyed 1987 — treat with caution

Avg Weight

0.15 lbs

Catch rate: 10.7 per trap net · typical 1.5–6.8 for a lake like this

Survey History

Date	Catch Rate	Avg Length	Avg Weight	Gear
Jul 6, 1987	10.00	-	0.15 lbs	Standard gill nets
Jul 6, 1987	10.67	-	0.15 lbs	Standard trap nets
Jul 9, 1973	36.25	-	0.15 lbs	Standard trap nets

Rock Bass

Good · 61

Above-normal numbers · average-size fish

Trap-net survey · surveyed Jul 1987

Last surveyed 1987 — treat with caution

Avg Weight

0.22 lbs

Catch rate: 2.0 per trap net · typical 0.4–1.7 for a lake like this

Survey History

Date	Catch Rate	Avg Length	Avg Weight	Gear
Jul 6, 1987	3.00	-	0.29 lbs	Standard gill nets
Jul 6, 1987	2.00	-	0.22 lbs	Standard trap nets
Jul 9, 1973	7.50	-	0.20 lbs	Standard trap nets

Bluegill

Good · 58

Typical numbers · average-size fish

Trap-net survey · surveyed Jul 1987

Last surveyed 1987 — treat with caution

Avg Weight

0.14 lbs

Catch rate: 40.0 per trap net · typical 9.5–57.3 for a lake like this

Survey History

Date	Catch Rate	Avg Length	Avg Weight	Gear
Jul 6, 1987	12.67	-	0.09 lbs	Standard gill nets
Jul 6, 1987	40.00	-	0.14 lbs	Standard trap nets
Jul 9, 1973	70.38	-	0.13 lbs	Standard trap nets

Yellow Perch

Good · 58

Typical numbers · average-size fish

Gill-net survey · surveyed Jul 1987

Last surveyed 1987 — treat with caution

Avg Weight

0.12 lbs

Catch rate: 8.3 per gill net · typical 1–10.3 for a lake like this

Survey History

Date	Catch Rate	Avg Length	Avg Weight	Gear
Jul 6, 1987	1.67	-	0.16 lbs	Standard trap nets
Jul 6, 1987	8.33	-	0.12 lbs	Standard gill nets
Jul 9, 1973	2.25	-	0.14 lbs	Standard trap nets

Walleye

Good · 54

Below-normal numbers · large fish

Gill-net survey · surveyed Jul 1987

Last surveyed 1987 — treat with caution

Avg Weight

7.00 lbs

Catch rate: 0.33 per gill net · typical 0.5–2.3 for a lake like this

Survey History

Date	Catch Rate	Avg Length	Avg Weight	Gear
Jul 6, 1987	0.33	-	7.00 lbs	Standard gill nets

Largemouth Bass

Good · 50

Average-size fish

Gill-net survey · surveyed Jul 1987

Last surveyed 1987 — treat with caution

Avg Weight

0.93 lbs

Catch rate: 1.3 per gill net · typical 0.4–1.6 for a lake like this

Survey History

Date	Catch Rate	Avg Length	Avg Weight	Gear
Jul 6, 1987	1.33	-	0.93 lbs	Standard gill nets
Jul 6, 1987	1.00	-	0.83 lbs	Standard trap nets
Jul 9, 1973	1.62	-	0.15 lbs	Standard trap nets

Other species in this lake (4)

Rough fish, bullheads, and baitfish recorded in DNR surveys — present in the lake, but not typical angling targets.

Brown Bullhead

Good · 57

Typical numbers · average-size fish

Trap-net survey · surveyed Jul 1973

Last surveyed 1973 — treat with caution

Avg Weight

0.65 lbs

Catch rate: 1.8 per trap net · typical 0.6–2.6 for a lake like this

Survey History

Date	Catch Rate	Avg Length	Avg Weight	Gear
Jul 6, 1987	0.33	-	0.50 lbs	Standard gill nets
Jul 9, 1973	1.75	-	0.65 lbs	Standard trap nets

Black Bullhead

Good · 50

Average-size fish

Gill-net survey · surveyed Jul 1987

Last surveyed 1987 — treat with caution

Avg Weight

0.60 lbs

Catch rate: 0.67 per gill net · typical 0.4–3.1 for a lake like this

Survey History

Date	Catch Rate	Avg Length	Avg Weight	Gear
Jul 6, 1987	0.67	-	0.60 lbs	Standard gill nets

White Sucker

Average · 43

Typical numbers · small fish

Gill-net survey · surveyed Jul 1973

Last surveyed 1973 — treat with caution

Avg Weight

1.45 lbs

Catch rate: 0.67 per gill net · typical 0.3–1.7 for a lake like this

Survey History

Date	Catch Rate	Avg Length	Avg Weight	Gear
Jul 9, 1973	0.67	-	1.45 lbs	Standard gill nets

Yellow Bullhead

Poor · 15

Below-normal numbers · small fish

Trap-net survey · surveyed Jul 1987

Last surveyed 1987 — treat with caution

Avg Weight

0.30 lbs

Catch rate: 0.33 per trap net · typical 2.7–13.5 for a lake like this

Survey History

Date	Catch Rate	Avg Length	Avg Weight	Gear
Jul 6, 1987	1.00	-	0.43 lbs	Standard gill nets
Jul 6, 1987	0.33	-	0.30 lbs	Standard trap nets
Jul 9, 1973	3.00	-	0.67 lbs	Standard trap nets

See the best black crappie lakes in Minnesota

Fishing Regulations

Statewide limits

Standard statewide Minnesota limits for the species in this lake.

Walleye and Sauger

Season: May 9, 2026 – Feb 28, 2027

6 combined, not more than one walleye over 20"

Northern Pike

Season: May 9, 2026 – Feb 28, 2027

North-central zone

Angling: 10 (not more than 2 over 26". All from 22-26" must be immediatley released).

Largemouth Bass

Season: Mar 1, 2026 – May 22, 2026

Largemouth bass in the Southern and North-central zones

Catch-and-release only

Largemouth Bass

Season: May 23, 2026 – Feb 28, 2027

Largemouth bass in the Southern and North-central zones

6 combined total largemouth or smallmouth (when smallmouth season is open)

Crappie

10 combined total

Sunfish

20 combined total

Perch

20 daily and 40 in possession

More statewide rules (spearing, rough fish)

Northern Pike

Season: Nov 15, 2026 – Feb 28, 2027

North-central zone

Darkhouse spearing: 10 (only 1 between 22-26" and 1 over 26"; or, only 2 over 26").

Rock Bass

Bowfin, buffalo, carp, carpsuckers, freshwater drum, goldeneye, redhorse, and suckers

no limit

Bullhead

100

Biologist Notes

July 6, 1987ALTHOUGH BLACK CRAPPIE WERE NOT TAKEN DURING THE SURVEY, THE OWNER OF CAMP SECLUSION SAID IT WAS AN EXCELLENT WINTER AND SUMMER CRAPPIE FISHING LAKE.…

ALTHOUGH BLACK CRAPPIE WERE NOT TAKEN DURING THE SURVEY, THE OWNER OF CAMP SECLUSION SAID IT WAS AN EXCELLENT WINTER AND SUMMER CRAPPIE FISHING LAKE. ANY WALLEYE THAT ARE CAUGHT ARE LARGE.THE FISH POPULATION LOOKS VERY SIMILAR TO WHAT WAS FOUND IN THE 1973 SURVEY WITH THE BULK OF THE POPULATION MADE UP OF CENTRARCHIDS AND TULLIBEE AND THE REST COMPRISED OF NORTHERN PIKE, YELLOW PERCH, BULLHEADS AND BOWFIN. NET CATCHES AND AGE AND GROWTH ANALYSIS SHOW THAT THE BLUEGILL POPULATION IS ABUNDANT AND IS MADE UP OF RELATIVELY SMALL, SLOW-GROWING FISH. NUMBER AND GROWTH OF LARGEMOUTH BASS IS GOOD. NORTHERN PIKE REMAIN LOW IN NUMBERS AS COMPARED TO OTHER LAKES IN THE AREA. ALL YEAR CLASSES ARE PRESENT AND GROWTH APPEARS TO BE GOOD TO EXCELLENT.ONE LONGEAR SUNFISH WAS CAPTURED IN A TRAPNET AND THE IDENTIFICATION WAS CONFIRMED BY DR. JAMES UNDERHILLS, UNIVERSITY OF MINNESOTA.

July 9, 1973N Pike catch was relatively low for this type of lake. Rock Bass appear to be abundant. All other catches are in normal ranges.

N Pike catch was relatively low for this type of lake. Rock Bass appear to be abundant. All other catches are in normal ranges.

Frequently Asked Questions

What fish can you catch in Cooper?

Based on Minnesota DNR survey data, anglers target Black Crappie, Northern Pike, Hybrid Sunfish, Pumpkinseed, and Rock Bass in Cooper. See the full species list above for catch rates, size structure, and quality scores.

Is there public access at Cooper?

We don't have a confirmed public access point on record for Cooper. Check the DNR LakeFinder page for current access details before you go.

How deep is Cooper?

Cooper has a maximum depth of 70 feet, per Minnesota DNR data.

When were the main sport fish in Cooper last surveyed?

The most recent Minnesota DNR survey data for the main sport fish in Cooper is from 1987. Surveys this old should be treated with some caution — fish populations change over time.

Does Cooper have any invasive species?

No invasive species are on record for Cooper in Minnesota DNR data. Always clean, drain, and dry your equipment to help keep it that way.

Are there special fishing regulations on Cooper?

No — Cooper has no lake-specific regulations in the 2026 Minnesota DNR regulations, so statewide Minnesota limits apply. The statewide crappie limit is: 10 combined total. Verify current rules with the Minnesota DNR before keeping fish.