Boulder

Hubbard County, Minnesota — DOW #29016200

224 Surveys

Invasive Species Alert

Boulder has confirmed populations of:

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340.54
Acres
28 ft
Max Depth
0
14
Fish Species
6
Local Guides

DNR Fish Surveys

Catch-per-unit-effort (CPUE) data from Minnesota DNR fish population assessments on Boulder. Green = above normal range. Red = below normal.

Brown Bullhead

Date Gear CPUE Normal Range Avg Weight Total Catch
1998-08-31 Standard trap nets 0.1 (below normal) 0.4 – 2.1 0.46 lb 1
1973-08-27 Standard trap nets 20.0 (above normal) 0.4 – 2.1 0.88 lb 160
1973-08-27 Standard gill nets 0.7 (normal) 0.5 – 2.5 0.95 lb 2
2018-08-20 Standard trap nets 0.1 (below normal) 0.4 – 2.1 0.29 lb 1
2018-08-20 Standard gill nets 1.0 (normal) 0.5 – 2.5 1.03 lb 9
2008-08-20 Standard gill nets 2.1 (normal) 0.5 – 2.5 0.75 lb 19
1984-08-09 Standard trap nets 1.3 (normal) 0.4 – 2.1 1.11 lb 13
1984-08-09 Standard gill nets 0.3 (below normal) 0.5 – 2.5 0.85 lb 2
1993-08-23 Standard trap nets 0.9 (normal) 0.4 – 2.1 2.06 lb 8
1993-08-23 Standard gill nets 0.1 (below normal) 0.5 – 2.5 1.64 lb 1
2003-09-02 Standard trap nets 0.6 (normal) 0.4 – 2.1 0.96 lb 5
2003-09-02 Standard gill nets 0.4 (below normal) 0.5 – 2.5 0.61 lb 4
2013-08-19 Standard trap nets 0.1 (below normal) 0.4 – 2.1 1.05 lb 1
2013-08-19 Standard gill nets 0.7 (normal) 0.5 – 2.5 1.41 lb 6

Yellow Perch

Date Gear CPUE Normal Range Avg Weight Total Catch
1998-08-31 Standard trap nets 0.1 (below normal) 0.5 – 3.3 0.06 lb 1
1998-08-31 Standard gill nets 5.4 (normal) 3.4 – 43.6 0.14 lb 49
1973-08-27 Standard trap nets 7.3 (above normal) 0.5 – 3.3 0.27 lb 58
1973-08-27 Standard gill nets 46.7 (above normal) 3.4 – 43.6 0.25 lb 140
1949-07-25 Standard trap nets 3.3 (above normal) 0.5 – 3.3 0.23 lb 20
1949-07-25 Standard gill nets 69.9 (above normal) 3.4 – 43.6 0.02 lb 629
2018-08-20 Standard trap nets 2.2 (normal) 0.5 – 3.3 0.19 lb 20
2018-08-20 Standard gill nets 50.3 (above normal) 3.4 – 43.6 0.18 lb 453
2008-08-20 Standard trap nets 2.0 (normal) 0.5 – 3.3 0.13 lb 18
2008-08-20 Standard gill nets 3.9 (normal) 3.4 – 43.6 0.12 lb 35
1984-08-09 Standard trap nets 8.5 (above normal) 0.5 – 3.3 0.13 lb 85
1984-08-09 Standard gill nets 32.3 (normal) 3.4 – 43.6 0.14 lb 194
2018-07-25 50-ft beach seine 3.6 18
1993-08-23 Standard trap nets 3.1 (normal) 0.5 – 3.3 0.09 lb 28
1993-08-23 Standard gill nets 14.8 (normal) 3.4 – 43.6 0.14 lb 118
2003-09-02 Standard trap nets 0.2 (below normal) 0.5 – 3.3 0.13 lb 2
2003-09-02 Standard gill nets 0.1 (below normal) 3.4 – 43.6 0.11 lb 1
2013-08-19 Standard trap nets 1.7 (normal) 0.5 – 3.3 0.16 lb 15
2013-08-19 Standard gill nets 8.9 (normal) 3.4 – 43.6 0.12 lb 80

Yellow Bullhead

Date Gear CPUE Normal Range Avg Weight Total Catch
1998-08-31 Standard gill nets 5.3 (normal) 1.0 – 10.5 0.63 lb 48
1998-08-31 Standard trap nets 0.3 (below normal) 1.3 – 9.8 0.56 lb 3
1973-08-27 Standard gill nets 0.3 (below normal) 1.0 – 10.5 1.00 lb 1
1973-08-27 Standard trap nets 7.5 (normal) 1.3 – 9.8 0.74 lb 60
1949-07-25 Standard trap nets 0.2 (below normal) 1.3 – 9.8 0.54 lb 1
2018-08-20 Standard gill nets 16.6 (above normal) 1.0 – 10.5 0.61 lb 149
2018-08-20 Standard trap nets 0.6 (below normal) 1.3 – 9.8 1.02 lb 5
2008-08-20 Standard gill nets 14.3 (above normal) 1.0 – 10.5 0.48 lb 129
2008-08-20 Standard trap nets 3.0 (normal) 1.3 – 9.8 0.52 lb 27
1984-08-09 Standard gill nets 0.2 (below normal) 1.0 – 10.5 0.40 lb 1
1984-08-09 Standard trap nets 0.7 (below normal) 1.3 – 9.8 1.09 lb 7
1993-08-23 Standard gill nets 0.9 (below normal) 1.0 – 10.5 1.25 lb 7
1993-08-23 Standard trap nets 0.3 (below normal) 1.3 – 9.8 1.50 lb 3
2003-09-02 Standard gill nets 13.9 (above normal) 1.0 – 10.5 0.26 lb 125
2003-09-02 Standard trap nets 5.0 (normal) 1.3 – 9.8 0.54 lb 45
2013-08-19 Standard gill nets 9.4 (normal) 1.0 – 10.5 0.58 lb 85
2013-08-19 Standard trap nets 1.9 (normal) 1.3 – 9.8 0.57 lb 17

Northern Pike

Date Gear CPUE Normal Range Avg Weight Total Catch
1998-08-31 Standard gill nets 5.2 (normal) 3.5 – 10.5 1.13 lb 47
1998-08-31 Standard trap nets 0.3 0.92 lb 3
1973-08-27 Standard gill nets 8.0 (normal) 3.5 – 10.5 1.65 lb 24
1973-08-27 Standard trap nets 1.8 0.71 lb 14
1949-07-25 Standard gill nets 6.2 (normal) 3.5 – 10.5 0.52 lb 56
1949-07-25 Standard trap nets 1.3 0.01 lb 8
2018-08-20 Standard gill nets 2.6 (below normal) 3.5 – 10.5 3.05 lb 23
2018-08-20 Standard trap nets 0.2 6.33 lb 2
2008-08-20 Standard gill nets 6.2 (normal) 3.5 – 10.5 2.03 lb 56
2008-08-20 Standard trap nets 0.3 1.67 lb 3
1984-08-09 Standard gill nets 4.7 (normal) 3.5 – 10.5 1.76 lb 28
1984-08-09 Standard trap nets 0.3 1.92 lb 3
1993-08-23 Standard gill nets 4.4 (normal) 3.5 – 10.5 2.07 lb 35
1993-08-23 Standard trap nets 0.4 4.45 lb 4
2003-09-02 Standard gill nets 5.2 (normal) 3.5 – 10.5 1.69 lb 47
2003-09-02 Standard trap nets 0.3 2.30 lb 3
2013-08-19 Standard gill nets 7.9 (normal) 3.5 – 10.5 2.56 lb 71
2013-08-19 Standard trap nets 0.9 1.94 lb 8

Smallmouth Bass

Date Gear CPUE Normal Range Avg Weight Total Catch
1998-08-31 Standard electrofishing 0.8 0.20 lb 1
1998-08-31 Standard trap nets 0.1 (normal) 0.1 – 0.9 0.17 lb 1
2018-08-20 Standard electrofishing 18.1 0.44 lb 21
2018-08-20 Standard gill nets 0.2 (normal) 0.2 – 1.4 1.51 lb 2
2008-08-20 Standard electrofishing 9.6 1.05 lb 12
2008-08-20 Standard gill nets 0.7 (normal) 0.2 – 1.4 0.89 lb 6
2008-08-20 Standard trap nets 0.2 (normal) 0.1 – 0.9 0.28 lb 2
2018-07-25 15-ft beach seine 0.7 2
2018-07-25 50-ft beach seine 4.4 22
2018-07-25 Backpack electrofishing 17.8 12
2003-09-02 Standard electrofishing 34.3 0.52 lb 46
2003-09-02 Standard gill nets 0.3 (normal) 0.2 – 1.4 0.95 lb 3
2003-09-02 Standard trap nets 0.1 (normal) 0.1 – 0.9 0.26 lb 1
2013-08-19 Standard electrofishing 22.6 0.81 lb 31
2013-08-19 Standard gill nets 0.4 (normal) 0.2 – 1.4 1.52 lb 4

Rock Bass

Date Gear CPUE Normal Range Avg Weight Total Catch
1998-08-31 Standard gill nets 1.3 (normal) 0.3 – 1.9 0.26 lb 12
1998-08-31 Standard trap nets 2.0 (above normal) 0.5 – 1.8 0.31 lb 18
1973-08-27 Standard trap nets 0.5 (normal) 0.5 – 1.8 0.33 lb 4
1949-07-25 Standard trap nets 0.8 (normal) 0.5 – 1.8 0.24 lb 5
1949-07-25 Standard gill nets 0.2 (below normal) 0.3 – 1.9 0.32 lb 2
2018-08-20 Standard gill nets 0.6 (normal) 0.3 – 1.9 0.26 lb 5
2018-08-20 Standard trap nets 0.4 (below normal) 0.5 – 1.8 0.12 lb 4
2008-08-20 Standard gill nets 0.1 (below normal) 0.3 – 1.9 0.21 lb 1
2008-08-20 Standard trap nets 0.6 (normal) 0.5 – 1.8 0.21 lb 5
1984-08-09 Standard gill nets 0.3 (normal) 0.3 – 1.9 0.25 lb 2
1984-08-09 Standard trap nets 4.1 (above normal) 0.5 – 1.8 0.24 lb 41
2018-07-25 50-ft beach seine 0.4 2
2018-07-25 Backpack electrofishing 7.4 5
1993-08-23 Standard trap nets 0.3 (below normal) 0.5 – 1.8 0.56 lb 3
2003-09-02 Standard gill nets 0.2 (below normal) 0.3 – 1.9 0.35 lb 2
2003-09-02 Standard trap nets 0.4 (below normal) 0.5 – 1.8 0.30 lb 4
2013-08-19 Standard gill nets 0.1 (below normal) 0.3 – 1.9 0.16 lb 1
2013-08-19 Standard trap nets 0.3 (below normal) 0.5 – 1.8 0.49 lb 3

Largemouth Bass

Date Gear CPUE Normal Range Avg Weight Total Catch
1998-08-31 Standard electrofishing 10.5 1.64 lb 13
1998-08-31 Standard gill nets 0.2 (below normal) 0.3 – 1.7 0.28 lb 2
1973-08-27 Standard trap nets 0.5 (normal) 0.3 – 1.3 0.50 lb 4
2018-08-20 Standard electrofishing 107.9 0.85 lb 125
2018-08-20 Standard gill nets 6.0 (above normal) 0.3 – 1.7 0.80 lb 54
2018-08-20 Standard trap nets 0.2 (below normal) 0.3 – 1.3 0.44 lb 2
2008-08-20 Standard electrofishing 53.5 0.82 lb 67
2008-08-20 Standard gill nets 2.3 (above normal) 0.3 – 1.7 0.92 lb 21
1984-08-09 Standard trap nets 0.8 (normal) 0.3 – 1.3 0.16 lb 8
2018-07-25 Backpack electrofishing 4.5 3
2018-07-25 50-ft beach seine 1.6 8
1993-08-23 Standard gill nets 0.3 (below normal) 0.3 – 1.7 1.58 lb 2
2003-09-02 Standard electrofishing 18.6 0.79 lb 25
2003-09-02 Standard gill nets 0.8 (normal) 0.3 – 1.7 0.59 lb 7
2013-08-19 Standard electrofishing 46.6 1.21 lb 64
2013-08-19 Standard gill nets 2.1 (above normal) 0.3 – 1.7 1.37 lb 19
2013-08-19 Standard trap nets 0.4 (normal) 0.3 – 1.3 0.54 lb 4

Walleye

Date Gear CPUE Normal Range Avg Weight Total Catch
1998-08-31 Standard gill nets 7.4 (above normal) 1.3 – 5.0 0.95 lb 67
1998-08-31 Standard trap nets 0.3 (normal) 0.3 – 0.7 1.72 lb 3
1973-08-27 Standard gill nets 6.7 (above normal) 1.3 – 5.0 1.14 lb 20
1973-08-27 Standard trap nets 2.6 (above normal) 0.3 – 0.7 1.87 lb 21
1949-07-25 Standard gill nets 4.8 (normal) 1.3 – 5.0 0.59 lb 43
1949-07-25 Standard trap nets 0.3 (normal) 0.3 – 0.7 0.75 lb 2
2018-08-20 Standard gill nets 6.1 (above normal) 1.3 – 5.0 1.61 lb 55
2018-08-20 Standard trap nets 0.6 (normal) 0.3 – 0.7 2.45 lb 5
2008-08-20 Standard gill nets 6.3 (above normal) 1.3 – 5.0 1.74 lb 57
2008-08-20 Standard trap nets 1.2 (above normal) 0.3 – 0.7 2.09 lb 11
1984-08-09 Standard gill nets 5.7 (above normal) 1.3 – 5.0 1.15 lb 34
1984-08-09 Standard trap nets 1.3 (above normal) 0.3 – 0.7 1.42 lb 13
1993-08-23 Standard gill nets 9.0 (above normal) 1.3 – 5.0 1.04 lb 72
1993-08-23 Standard trap nets 0.2 (below normal) 0.3 – 0.7 3.24 lb 2
2003-09-02 Standard gill nets 3.0 (normal) 1.3 – 5.0 1.52 lb 27
2003-09-02 Standard trap nets 0.1 (below normal) 0.3 – 0.7 1.34 lb 1
2013-08-19 Standard gill nets 5.8 (above normal) 1.3 – 5.0 1.67 lb 52
2013-08-19 Standard trap nets 0.7 (normal) 0.3 – 0.7 0.86 lb 6

Bluegill

Date Gear CPUE Normal Range Avg Weight Total Catch
1998-08-31 Standard gill nets 0.1 0.73 lb 1
1998-08-31 Standard trap nets 0.7 (below normal) 6.1 – 46.6 0.06 lb 6
1973-08-27 Standard gill nets 0.3 0.05 lb 1
1973-08-27 Standard trap nets 2.8 (below normal) 6.1 – 46.6 0.22 lb 22
1949-07-25 Standard trap nets 0.8 (below normal) 6.1 – 46.6 0.18 lb 5
1949-07-25 Standard gill nets 1.6 0.29 lb 14
2018-08-20 Standard gill nets 8.1 0.19 lb 73
2018-08-20 Standard trap nets 10.2 (normal) 6.1 – 46.6 0.08 lb 92
2008-08-20 Standard gill nets 2.3 0.20 lb 21
2008-08-20 Standard trap nets 13.3 (normal) 6.1 – 46.6 0.15 lb 120
1984-08-09 Standard gill nets 0.2 0.10 lb 1
1984-08-09 Standard trap nets 4.0 (below normal) 6.1 – 46.6 0.10 lb 40
2018-07-25 Backpack electrofishing 6.0 4
2018-07-25 15-ft beach seine 3.3 10
2018-07-25 50-ft beach seine 77.0 385
1993-08-23 Standard gill nets 0.3 0.06 lb 2
1993-08-23 Standard trap nets 3.2 (below normal) 6.1 – 46.6 0.07 lb 29
2003-09-02 Standard gill nets 1.4 0.10 lb 13
2003-09-02 Standard trap nets 1.3 (below normal) 6.1 – 46.6 0.23 lb 12
2013-08-19 Standard gill nets 1.4 0.17 lb 13
2013-08-19 Standard trap nets 11.2 (normal) 6.1 – 46.6 0.14 lb 101

Pumpkinseed

Date Gear CPUE Normal Range Avg Weight Total Catch
1998-08-31 Standard gill nets 2.9 0.14 lb 26
1998-08-31 Standard trap nets 0.7 (below normal) 2.0 – 8.5 0.27 lb 6
1973-08-27 Standard gill nets 3.7 0.29 lb 11
1973-08-27 Standard trap nets 23.4 (above normal) 2.0 – 8.5 0.08 lb 187
1949-07-25 Standard gill nets 7.1 0.12 lb 64
1949-07-25 Standard trap nets 2.3 (normal) 2.0 – 8.5 0.13 lb 14
2018-08-20 Standard gill nets 9.1 0.20 lb 82
2018-08-20 Standard trap nets 2.9 (normal) 2.0 – 8.5 0.10 lb 26
2008-08-20 Standard gill nets 5.9 0.25 lb 53
2008-08-20 Standard trap nets 2.6 (normal) 2.0 – 8.5 0.17 lb 23
1984-08-09 Standard gill nets 0.3 0.30 lb 2
1984-08-09 Standard trap nets 7.8 (normal) 2.0 – 8.5 0.14 lb 78
2018-07-25 50-ft beach seine 2.4 12
1993-08-23 Standard gill nets 0.4 0.14 lb 3
1993-08-23 Standard trap nets 0.9 (below normal) 2.0 – 8.5 0.25 lb 8
2003-09-02 Standard gill nets 1.4 0.14 lb 13
2003-09-02 Standard trap nets 0.8 (below normal) 2.0 – 8.5 0.18 lb 7
2013-08-19 Standard gill nets 6.0 0.16 lb 54
2013-08-19 Standard trap nets 5.1 (normal) 2.0 – 8.5 0.15 lb 46

White Sucker

Date Gear CPUE Normal Range Avg Weight Total Catch
1998-08-31 Standard gill nets 6.8 (above normal) 0.5 – 2.7 1.55 lb 61
1998-08-31 Standard trap nets 1.1 (normal) 0.3 – 1.4 2.34 lb 10
1973-08-27 Standard gill nets 12.0 (above normal) 0.5 – 2.7 2.98 lb 36
1973-08-27 Standard trap nets 2.6 (above normal) 0.3 – 1.4 3.06 lb 21
1949-07-25 Standard gill nets 2.7 (normal) 0.5 – 2.7 1.01 lb 24
2018-08-20 Standard gill nets 2.3 (normal) 0.5 – 2.7 2.61 lb 21
2008-08-20 Standard gill nets 3.1 (above normal) 0.5 – 2.7 2.61 lb 28
2008-08-20 Standard trap nets 0.2 (below normal) 0.3 – 1.4 3.17 lb 2
1984-08-09 Standard gill nets 4.8 (above normal) 0.5 – 2.7 1.88 lb 29
1984-08-09 Standard trap nets 1.7 (above normal) 0.3 – 1.4 2.97 lb 17
1993-08-23 Standard gill nets 7.8 (above normal) 0.5 – 2.7 3.08 lb 62
1993-08-23 Standard trap nets 3.7 (above normal) 0.3 – 1.4 6.27 lb 33
2003-09-02 Standard gill nets 6.7 (above normal) 0.5 – 2.7 1.63 lb 60
2003-09-02 Standard trap nets 2.2 (above normal) 0.3 – 1.4 2.40 lb 20
2013-08-19 Standard gill nets 6.1 (above normal) 0.5 – 2.7 2.28 lb 55
2013-08-19 Standard trap nets 0.2 (below normal) 0.3 – 1.4 2.54 lb 2

Black Crappie

Date Gear CPUE Normal Range Avg Weight Total Catch
1998-08-31 Standard gill nets 0.7 (normal) 0.6 – 3.5 0.68 lb 6
1998-08-31 Standard trap nets 1.1 (normal) 0.7 – 3.4 0.55 lb 10
1973-08-27 Standard gill nets 1.0 (normal) 0.6 – 3.5 0.10 lb 3
1973-08-27 Standard trap nets 4.5 (above normal) 0.7 – 3.4 0.67 lb 36
1949-07-25 Standard gill nets 0.2 (below normal) 0.6 – 3.5 0.32 lb 2
2018-08-20 Standard gill nets 3.1 (normal) 0.6 – 3.5 0.43 lb 28
2018-08-20 Standard trap nets 0.4 (below normal) 0.7 – 3.4 0.24 lb 4
2008-08-20 Standard electrofishing 5.6 0.56 lb 7
2008-08-20 Standard gill nets 1.7 (normal) 0.6 – 3.5 0.34 lb 15
2008-08-20 Standard trap nets 1.8 (normal) 0.7 – 3.4 0.37 lb 16
1993-08-23 Standard gill nets 2.3 (normal) 0.6 – 3.5 0.45 lb 18
1993-08-23 Standard trap nets 1.1 (normal) 0.7 – 3.4 0.66 lb 10
2003-09-02 Standard electrofishing 0.7 0.88 lb 1
2003-09-02 Standard gill nets 0.3 (below normal) 0.6 – 3.5 0.64 lb 3
2003-09-02 Standard trap nets 0.3 (below normal) 0.7 – 3.4 0.29 lb 3
2013-08-19 Standard gill nets 1.6 (normal) 0.6 – 3.5 0.27 lb 14
2013-08-19 Standard trap nets 12.2 (above normal) 0.7 – 3.4 0.23 lb 110

Black Bullhead

Date Gear CPUE Normal Range Avg Weight Total Catch
1973-08-27 Standard gill nets 1.3 (normal) 0.8 – 7.7 1.05 lb 4
2018-08-20 Standard gill nets 0.1 (below normal) 0.8 – 7.7 0.58 lb 1

Hybrid Sunfish

Date Gear CPUE Normal Range Avg Weight Total Catch
2018-08-20 Standard trap nets 0.4 0.16 lb 4
2018-07-25 50-ft beach seine 0.6 3

SIP

Date Gear CPUE Normal Range Avg Weight Total Catch
1984-08-09 Standard gill nets 0.2 0.75 lb 1

Johnny Darter

Date Gear CPUE Normal Range Total Catch
2018-07-25 Backpack electrofishing 29.7 20
2018-07-25 15-ft beach seine 3.0 9
2018-07-25 50-ft beach seine 16.4 82

Bluntnose Minnow

Date Gear CPUE Normal Range Total Catch
2018-07-25 50-ft beach seine 23.8 119
2018-07-25 Backpack electrofishing 14.9 10
2018-07-25 15-ft beach seine 18.7 56

BKF

Date Gear CPUE Normal Range Total Catch
2018-07-25 50-ft beach seine 0.4 2

Iowa Darter

Date Gear CPUE Normal Range Total Catch
2018-07-25 50-ft beach seine 0.6 3
2018-07-25 Backpack electrofishing 3.0 2

Spottail Shiner

Date Gear CPUE Normal Range Total Catch
2018-07-25 15-ft beach seine 0.7 2

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Fish Species

Species known to inhabit Boulder. Click any species for a full fishing guide.

Black BullheadBlack CrappieBluegillBrown BullheadHybrid SunfishLargemouth BassNorthern PikePumpkinseedRock BassSmallmouth BassWalleyeWhite SuckerYellow BullheadYellow Perch

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Data sourced from Minnesota DNR Division of Fish and Wildlife. Last verified: March 19, 2026. Learn how we maintain this data.