Survey Report

Upsilon Lake
Rolette County

June 2026

2025 Survey Year

%

Fish Per

Length (Inches)

Weight (Pounds)

Variegated Mesh 6' x 80'

Catch

Net

Range

Average

Range

Average

Yellow Perch

66.2

23.0

5.1-9.1

6.7

0.1-0.3

0.1

Northern Pike

20.9

7.3

12.6-32.3

24.8

0.4-7.8

3.7

Bluegill

9.4

3.3

3.5-7.9

6.3

0.0-0.5

0.2

Walleye

3.6

1.3

12.2-23.2

18.3

0.6-4.6

2.6

2024 Survey Year

%

Fish Per

Length (Inches)

Weight (Pounds)

Variegated Mesh 6' x 80'

Catch

Net

Range

Average

Range

Average

Yellow Perch

60.3

20.5

5.1-9.1

6.9

0.1-0.4

0.2

Northern Pike

22.8

7.8

9.8-28.7

23.0

0.2-5.9

3.1

Walleye

12.5

4.3

12.2-25.6

19.8

0.6-6.2

3.1

Bluegill

4.4

1.5

4.7-7.1

5.8

0.1-0.3

0.2

2023 Survey Year

%

Fish Per

Length (Inches)

Weight (Pounds)

Variegated Mesh 6' x 80'

Catch

Net

Range

Average

Range

Average

Yellow Perch

54.7

11.8

5.5-8.7

6.5

0.1-0.3

0.1

Northern Pike

22.1

4.8

19.7-33.5

24.7

1.5-8.3

3.4

Walleye

16.3

3.5

18.1-24.0

19.9

2.0-4.8

2.9

Bluegill

7.0

1.5

3.9-5.9

4.7

0.0-0.2

0.1

2022 Survey Year

%

Fish Per

Length (Inches)

Weight (Pounds)

Variegated Mesh 6' x 80'

Catch

Net

Range

Average

Range

Average

Yellow Perch

49.3

9.0

5.1-8.3

6.7

0.1-0.2

0.2

Northern Pike

41.1

7.5

15.0-34.6

24.0

0.6-10.6

3.5

Walleye

5.5

1.0

14.6-21.7

18.0

1.0-4.2

2.5

Black Crappie

1.4

0.3

5.1-5.1

5.1

0.1-0.1

0.1

Bluegill

1.4

0.3

8.3-8.3

8.3

0.4-0.4

0.4

Fathead Minnow

1.4

0.3

2021 Survey Year

%

Fish Per

Length (Inches)

Weight (Pounds)

Variegated Mesh 6' x 80'

Catch

Net

Range

Average

Range

Average

Yellow Perch

61.6

15.3

5.1-9.1

6.5

0.1-0.3

0.1

Northern Pike

31.3

7.8

17.3-32.7

24.3

0.9-7.5

3.3

Bluegill

5.1

1.3

7.5-8.3

7.8

0.4-0.6

0.5

Walleye

2.0

0.5

18.5-18.9

18.7

2.2-2.3

2.2

2020 Survey Year

%

Fish Per

Length (Inches)

Weight (Pounds)

Variegated Mesh 6' x 80'

Catch

Net

Range

Average

Range

Average

Yellow Perch

72.7

26.0

5.1-7.9

6.3

0.1-0.2

0.1

Northern Pike

14.7

5.3

19.3-39.0

24.2

1.5-15.0

3.8

Bluegill

9.1

3.3

5.5-6.7

6.0

0.1-0.3

0.2

Walleye

2.8

1.0

15.0-24.8

19.8

1.1-5.7

3.2

Black Crappie

0.7

0.3

11.0-11.0

11.0

0.8-0.8

0.8

2019 Survey Year

%

Fish Per

Length (Inches)

Weight (Pounds)

Variegated Mesh 6' x 80'

Catch

Net

Range

Average

Range

Average

Yellow Perch

51.7

7.5

5.1-7.1

5.8

0.1-0.2

0.1

Northern Pike

36.2

5.3

15.7-36.2

23.5

0.8-10.4

3.4

Bluegill

6.9

1.0

3.9-5.5

4.8

0.0-0.2

0.1

Walleye

5.2

0.8

16.9-20.5

18.9

1.7-3.0

2.5

2018 Survey Year

%

Fish Per

Length (Inches)

Weight (Pounds)

Variegated Mesh 6' x 80'

Catch

Net

Range

Average

Range

Average

Yellow Perch

45.7

14.8

5.1-10.6

6.6

0.1-0.4

0.1

Walleye

20.2

6.5

15.4-28.7

21.0

1.1-7.1

3.5

Northern Pike

18.6

6.0

16.5-41.7

23.4

0.9-20.0

3.5

Bluegill

15.5

5.0

3.5-10.6

5.1

0.0-1.2

0.2

2017 Survey Year

%

Fish Per

Length (Inches)

Weight (Pounds)

Variegated Mesh 6' x 80'

Catch

Net

Range

Average

Range

Average

Yellow Perch

56.8

11.5

5.1-11.4

6.8

0.1-0.7

0.2

Northern Pike

18.5

3.8

13.0-37.4

24.6

0.4-12.7

4.5

Walleye

13.6

2.8

13.0-24.4

19.6

0.7-5.2

3.0

Bluegill

11.1

2.3

3.5-10.2

7.4

0.0-1.2

0.6

2016 Survey Year

%

Fish Per

Length (Inches)

Weight (Pounds)

Variegated Mesh 6' x 80'

Catch

Net

Range

Average

Range

Average

Yellow Perch

59.5

11.8

4.7-10.2

7.1

0.1-0.6

0.2

Northern Pike

26.6

5.3

15.4-35.4

25.1

0.8-10.6

4.3

Walleye

11.4

2.3

10.6-28.7

19.5

0.4-8.8

3.2

Bluegill

2.5

0.5

9.8-10.2

10.0

0.9-1.4

1.1

2015 Survey Year

%

Fish Per

Length (Inches)

Weight (Pounds)

Variegated Mesh 6' x 80'

Catch

Net

Range

Average

Range

Average

Yellow Perch

49.2

7.3

5.9-11.0

8.7

0.1-0.7

0.3

Northern Pike

23.7

3.5

18.1-33.5

25.1

1.3-8.6

4.0

Walleye

18.6

2.8

15.0-21.7

19.3

1.1-4.3

2.7

Bluegill

8.5

1.3

7.5-9.8

8.5

0.4-1.1

0.7