Rock

Lyon County, Minnesota — DOW #42005200

134 Surveys
379.13
Acres
7.9 ft
Max Depth
0
10
Fish Species
0
Local Guides

DNR Fish Surveys

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

Green Sunfish

Date Gear CPUE Normal Range Avg Weight Total Catch
2002-06-24 Standard trap nets 0.1 (below normal) 0.2 – 1.9 0.18 lb 1
2010-06-28 Standard trap nets 0.5 (normal) 0.2 – 1.9 0.06 lb 4
2018-07-09 Standard trap nets 0.2 (normal) 0.2 – 1.9 0.06 lb 2
1987-08-04 Standard trap nets 0.2 (normal) 0.2 – 1.9 0.25 lb 2
2006-06-26 Survey seining 0.7 2

Northern Pike

Date Gear CPUE Normal Range Avg Weight Total Catch
2002-06-24 Standard gill nets 0.3 (below normal) 1.1 – 8.0 1.10 lb 1
2002-06-24 Standard trap nets 0.1 11.24 lb 1
2010-06-28 Standard trap nets 0.1 0.11 lb 1
1990-08-06 Standard trap nets 0.1 4.75 lb 1
1994-08-01 Standard gill nets 0.2 (below normal) 1.1 – 8.0 1.94 lb 1
1994-08-01 Standard trap nets 0.5 3.60 lb 4
2014-06-23 Standard gill nets 0.3 (below normal) 1.1 – 8.0 1
2014-06-23 Standard trap nets 0.2 0.94 lb 2

Black Crappie

Date Gear CPUE Normal Range Avg Weight Total Catch
2002-06-24 Standard gill nets 0.7 (below normal) 1.4 – 13.8 0.24 lb 2
2002-06-24 Standard trap nets 4.7 (normal) 1.2 – 20.5 0.70 lb 42
1985-06-16 Standard gill nets 0.5 (below normal) 1.4 – 13.8 0.40 lb 1
2010-06-28 Standard gill nets 1.0 (below normal) 1.4 – 13.8 0.05 lb 3
2010-06-28 Standard trap nets 1.4 (normal) 1.2 – 20.5 0.48 lb 11
1990-08-06 Standard trap nets 0.1 (below normal) 1.2 – 20.5 0.06 lb 1
2018-07-09 Standard gill nets 1.0 (below normal) 1.4 – 13.8 0.24 lb 3
2018-07-09 Standard trap nets 3.9 (normal) 1.2 – 20.5 0.15 lb 35
1994-08-01 Survey seining 1.7 5
1994-08-01 Standard trap nets 0.3 (below normal) 1.2 – 20.5 0.67 lb 2
1987-08-04 Standard gill nets 2.0 (normal) 1.4 – 13.8 0.40 lb 8
1987-08-04 Standard trap nets 1.9 (normal) 1.2 – 20.5 0.25 lb 17
2006-06-26 Standard gill nets 1.3 (below normal) 1.4 – 13.8 0.17 lb 4
2006-06-26 Standard trap nets 2.9 (normal) 1.2 – 20.5 0.27 lb 23
2006-06-26 Survey seining 2.7 8

Black Bullhead

Date Gear CPUE Normal Range Avg Weight Total Catch
2002-06-24 Standard gill nets 105.0 (normal) 30.3 – 150.6 0.18 lb 315
2002-06-24 Standard trap nets 113.9 (normal) 11.5 – 132.6 0.11 lb 1025
1985-06-16 Standard gill nets 236.0 (above normal) 30.3 – 150.6 0.14 lb 472
1985-06-16 Standard trap nets 138.6 (above normal) 11.5 – 132.6 0.33 lb 1247
2010-06-28 Standard gill nets 4.0 (below normal) 30.3 – 150.6 0.24 lb 12
2010-06-28 Standard trap nets 2.5 (below normal) 11.5 – 132.6 0.88 lb 20
1990-08-06 Standard gill nets 11.3 (below normal) 30.3 – 150.6 0.72 lb 45
1990-08-06 Standard trap nets 4.6 (below normal) 11.5 – 132.6 0.80 lb 32
2018-07-09 Standard gill nets 3.7 (below normal) 30.3 – 150.6 0.36 lb 11
2018-07-09 Standard trap nets 1.3 (below normal) 11.5 – 132.6 0.76 lb 12
1994-08-01 Standard trap nets 8.9 (below normal) 11.5 – 132.6 0.48 lb 71
1994-08-01 Standard gill nets 4.4 (below normal) 30.3 – 150.6 0.64 lb 22
1987-08-04 Standard gill nets 205.0 (above normal) 30.3 – 150.6 0.45 lb 820
1987-08-04 Standard trap nets 65.9 (normal) 11.5 – 132.6 0.60 lb 593
2006-06-26 Standard gill nets 15.7 (below normal) 30.3 – 150.6 0.51 lb 47
2006-06-26 Standard trap nets 10.6 (below normal) 11.5 – 132.6 1.00 lb 85
2006-06-26 Survey seining 0.7 2
2014-06-23 Standard gill nets 27.7 (below normal) 30.3 – 150.6 0.17 lb 83
2014-06-23 Standard trap nets 7.9 (below normal) 11.5 – 132.6 0.48 lb 71

OSS

Date Gear CPUE Normal Range Avg Weight Total Catch
2002-06-24 Standard trap nets 0.1 0.03 lb 1
1990-08-06 Standard trap nets 0.1 0.06 lb 1
2018-07-09 Standard trap nets 0.4 0.04 lb 4
2006-06-26 Survey seining 3.0 9
2014-06-23 Standard trap nets 0.1 0.03 lb 1

White Sucker

Date Gear CPUE Normal Range Avg Weight Total Catch
2002-06-24 Standard gill nets 1.0 (normal) 0.8 – 6.5 1.39 lb 3
1985-06-16 Standard gill nets 1.0 (normal) 0.8 – 6.5 1.70 lb 2
1985-06-16 Standard trap nets 4.0 (above normal) 0.3 – 2.6 1.98 lb 36
2010-06-28 Standard gill nets 2.0 (normal) 0.8 – 6.5 1.24 lb 6
2010-06-28 Standard trap nets 0.4 (normal) 0.3 – 2.6 3.02 lb 3
1990-08-06 Standard gill nets 2.0 (normal) 0.8 – 6.5 2.53 lb 8
1990-08-06 Standard trap nets 0.1 (below normal) 0.3 – 2.6 3.56 lb 1
2018-07-09 Standard gill nets 0.7 (below normal) 0.8 – 6.5 1.65 lb 2
2018-07-09 Standard trap nets 0.4 (normal) 0.3 – 2.6 2.97 lb 4
1994-08-01 Survey seining 0.7 2
1994-08-01 Standard gill nets 1.6 (normal) 0.8 – 6.5 1.90 lb 8
1994-08-01 Standard trap nets 0.6 (normal) 0.3 – 2.6 1.47 lb 5
1987-08-04 Standard gill nets 1.0 (normal) 0.8 – 6.5 1.82 lb 4
1987-08-04 Standard trap nets 2.0 (normal) 0.3 – 2.6 2.51 lb 18
2014-06-23 Standard gill nets 3.3 (normal) 0.8 – 6.5 2.34 lb 10
2014-06-23 Standard trap nets 0.2 (below normal) 0.3 – 2.6 2.84 lb 2

Bluegill

Date Gear CPUE Normal Range Total Catch
2002-06-24 Standard trap nets 0.1 (below normal) 1.2 – 20.0 1

Yellow Perch

Date Gear CPUE Normal Range Avg Weight Total Catch
2002-06-24 Standard trap nets 1.3 (normal) 0.3 – 3.8 0.64 lb 12
2002-06-24 Standard gill nets 17.3 (normal) 2.7 – 25.0 0.35 lb 52
1985-06-16 Standard trap nets 0.3 (normal) 0.3 – 3.8 0.37 lb 3
1985-06-16 Standard gill nets 2.5 (below normal) 2.7 – 25.0 0.38 lb 5
2010-06-28 Standard trap nets 0.9 (normal) 0.3 – 3.8 0.28 lb 7
2010-06-28 Standard gill nets 33.7 (above normal) 2.7 – 25.0 0.38 lb 101
1990-08-06 Standard trap nets 0.4 (normal) 0.3 – 3.8 0.71 lb 3
1990-08-06 Standard gill nets 25.0 (normal) 2.7 – 25.0 0.29 lb 100
2018-07-09 Standard trap nets 0.2 (below normal) 0.3 – 3.8 0.35 lb 2
2018-07-09 Standard gill nets 23.7 (normal) 2.7 – 25.0 0.53 lb 71
1994-08-01 Standard trap nets 0.5 (normal) 0.3 – 3.8 0.29 lb 4
1994-08-01 Survey seining 3.3 10
1994-08-01 Standard gill nets 14.4 (normal) 2.7 – 25.0 0.39 lb 72
1987-08-04 Standard trap nets 1.0 (normal) 0.3 – 3.8 0.50 lb 9
1987-08-04 Standard gill nets 7.8 (normal) 2.7 – 25.0 0.44 lb 31
2006-06-26 Standard gill nets 10.0 (normal) 2.7 – 25.0 0.81 lb 30
2014-06-23 Standard trap nets 1.4 (normal) 0.3 – 3.8 0.18 lb 13
2014-06-23 Standard gill nets 12.7 (normal) 2.7 – 25.0 0.17 lb 38

Walleye

Date Gear CPUE Normal Range Avg Weight Total Catch
2002-06-24 Standard gill nets 22.7 (above normal) 2.3 – 18.1 1.84 lb 68
2002-06-24 Standard trap nets 0.6 (normal) 0.5 – 3.0 0.38 lb 5
1985-06-16 Standard gill nets 17.5 (normal) 2.3 – 18.1 2.37 lb 35
1985-06-16 Standard trap nets 7.4 (above normal) 0.5 – 3.0 2.32 lb 67
2010-06-28 Standard gill nets 6.3 (normal) 2.3 – 18.1 2.06 lb 19
2010-06-28 Standard trap nets 1.1 (normal) 0.5 – 3.0 1.72 lb 9
1990-08-06 Standard gill nets 28.8 (above normal) 2.3 – 18.1 1.49 lb 115
1990-08-06 Standard trap nets 6.3 (above normal) 0.5 – 3.0 2.42 lb 44
2018-07-09 Standard gill nets 6.0 (normal) 2.3 – 18.1 1.88 lb 18
2018-07-09 Standard trap nets 1.4 (normal) 0.5 – 3.0 2.02 lb 13
1994-08-01 Standard gill nets 8.0 (normal) 2.3 – 18.1 1.34 lb 40
1994-08-01 Standard trap nets 1.8 (normal) 0.5 – 3.0 1.83 lb 14
1987-08-04 Standard gill nets 30.8 (above normal) 2.3 – 18.1 1.16 lb 123
1987-08-04 Standard trap nets 2.9 (normal) 0.5 – 3.0 1.93 lb 26
2006-06-26 Standard gill nets 24.0 (above normal) 2.3 – 18.1 1.62 lb 72
2006-06-26 Standard trap nets 0.4 (below normal) 0.5 – 3.0 0.86 lb 3
2014-06-23 Standard gill nets 6.0 (normal) 2.3 – 18.1 1.86 lb 18
2014-06-23 Standard trap nets 0.9 (normal) 0.5 – 3.0 0.19 lb 8
2016-10-18 Fall electrofishing 574.7 431

Common Carp

Date Gear CPUE Normal Range Avg Weight Total Catch
2002-06-24 Standard gill nets 1.0 (normal) 1.0 – 13.8 5.51 lb 3
2002-06-24 Standard trap nets 0.4 (below normal) 1.0 – 5.5 8.38 lb 4
2010-06-28 Standard gill nets 5.0 (normal) 1.0 – 13.8 3.38 lb 15
2010-06-28 Standard trap nets 2.5 (normal) 1.0 – 5.5 6.13 lb 20
1990-08-06 Standard gill nets 196.3 (above normal) 1.0 – 13.8 0.07 lb 785
1990-08-06 Standard trap nets 594.4 (above normal) 1.0 – 5.5 0.07 lb 4161
2018-07-09 Standard gill nets 0.7 (below normal) 1.0 – 13.8 8.62 lb 2
2018-07-09 Standard trap nets 5.3 (normal) 1.0 – 5.5 7.02 lb 48
1994-08-01 Survey seining 0.3 1
1994-08-01 Standard gill nets 13.4 (normal) 1.0 – 13.8 2.35 lb 67
1994-08-01 Standard trap nets 12.6 (above normal) 1.0 – 5.5 2.60 lb 101
1987-08-04 Standard gill nets 9.0 (normal) 1.0 – 13.8 0.72 lb 36
1987-08-04 Standard trap nets 2.4 (normal) 1.0 – 5.5 5.96 lb 22
2006-06-26 Survey seining 2.0 6
2006-06-26 Standard gill nets 3.0 (normal) 1.0 – 13.8 2.63 lb 9
2006-06-26 Standard trap nets 0.4 (below normal) 1.0 – 5.5 4.54 lb 3
2014-06-23 Standard gill nets 3.7 (normal) 1.0 – 13.8 3.85 lb 11
2014-06-23 Standard trap nets 1.7 (normal) 1.0 – 5.5 6.99 lb 15

CRP

Date Gear CPUE Normal Range Avg Weight Total Catch
1985-06-16 Standard trap nets 2.9 4.54 lb 26

BIB

Date Gear CPUE Normal Range Avg Weight Total Catch
2018-07-09 Standard gill nets 0.7 (below normal) 0.8 – 7.0 0.76 lb 2
2018-07-09 Standard trap nets 0.3 (normal) 0.2 – 1.0 5.13 lb 3

Channel Catfish

Date Gear CPUE Normal Range Avg Weight Total Catch
2018-07-09 Standard trap nets 0.2 4.06 lb 2
2014-06-23 Standard gill nets 1.3 1.29 lb 4
2014-06-23 Standard trap nets 0.1 0.80 lb 1

Fathead Minnow

Date Gear CPUE Normal Range Total Catch
1994-08-01 Survey seining 14.7 44
2006-06-26 Survey seining 403.3 1210

SHI

Date Gear CPUE Normal Range Total Catch
1994-08-01 Survey seining 0.3 1

Sunfish

Date Gear CPUE Normal Range Total Catch
1994-08-01 Survey seining 1.3 4

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Fish Species

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

Bigmouth BuffaloBlack BullheadBlack CrappieChannel CatfishCommon CarpGreen SunfishOrangespotted SunfishWalleyeWhite SuckerYellow 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.