Minnesota DNR fisheries surveys · latest July 20, 2022
Species recorded at Rock Lake
17 species on the Minnesota DNR list for this lake. A species on the list has been recorded here; it does not mean it is catchable today or in every part of the lake.
Stocking at Rock Lake
No stocking record for Rock Lake appears in the Minnesota DNR material on file. That is an absence in the published record, not a confirmation that the lake is unstocked — some waters are managed as naturally reproducing and never appear in a stocking list at all.
Getting on the water
1 public boat landing is recorded on Rock Lake. Minnesota DNR lists the public access sites, including ramp type and parking, in the documents below.
Survey results in full
Minnesota DNR's Targeted Survey on July 20, 2022 caught 1.42 northern pike per hour of electrofishing at Rock Lake.
A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Rock Lake’s water-quality measurements separately, and the water-quality trend over 4 years of monitoring is improving. Catch rate is not a swim clearance and is not a weekly bite report.
DNR Fisheries Survey Summary
2 surveys on file from MN DNR Fisheries. Most recent: 2022-07-20 (Targeted Survey).
2 surveys on file · most recent 2022-07-20 (Targeted Survey)
| Species | Catch rate (CPUE) | Size | Avg weight |
|---|---|---|---|
| Green Sunfish | 97.83 | ||
| Largemouth Bass | 19.46 | 8 in 2022-06-06 | 0.34 lb |
| Bluegill | 15.25 | 3–8 in 2022-06-06 | 0.12 lb |
| Yellow Perch | 15.22 | 5–7 in 2022-06-06 | 0.07 lb |
| Bluntnose Minnow | 12.37 | ||
| Hybrid Sunfish | 8.34 | 4–7 in 2022-06-06 | 0.18 lb |
CPUE = catch per unit effort, fish caught per net per set in a standardised survey. It measures abundance, not size, and is not a weekly bite report.
Length Distributions
Number of fish caught at each inch class in the most recent survey that recorded lengths. Red dashed line marks an approximate trophy threshold for that species.
Largemouth Bass
Bluegill
Yellow Perch
Hybrid Sunfish
From the 2022-07-20 survey
Rock Lake is a 203 acre lake, with a maximum depth of 22', located three miles south of Pine Center in Crow Wing County. Rock is in the Mississippi River-Sartell watershed. A nearshore survey was conducted to assess the populations of both game and non-game fish species. Ten 100' long sampling stations were evenly…
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Rock Lake. 4 reports on file.
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- —Fisheries Lake Survey — RockFisheries Lake Survey · MN DNR LakeFinder
- —Aquatic Plant Report — Rock (0209)Aquatic Plant Report · MN DNR LakeFinder
- —Aquatic Plant Report — Rock (2036)Aquatic Plant Report · MN DNR LakeFinder
- —Public Water Access Sites — RockPublic Water Access Sites · MN DNR LakeFinder
Common questions
What fish are in Rock Lake?
Minnesota DNR's Targeted Survey on July 20, 2022 caught 1.42 northern pike per hour of electrofishing at Rock Lake. Minnesota DNR lists 17 species for the lake in total. Those are survey results, not a catch report: a net set on one date measures what was in that net.
When was Rock Lake last surveyed?
The most recent fisheries survey on file for Rock Lake is dated July 20, 2022. Survey intervals vary by lake and by species; a gap of several years between surveys is normal and does not mean the record is missing.
Is Rock Lake stocked?
No stocking record for Rock Lake appears in the Minnesota DNR material on file. That is not the same as a confirmed unstocked lake: it means no stocking document was published for it in the records this page draws on.
Do the water-quality readings tell me how Rock Lake fishes?
A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Rock Lake’s water-quality measurements separately, and the water-quality trend over 4 years of monitoring is improving. Catch rate is not a swim clearance and is not a weekly bite report.
Before you eat what you catch
Water-quality readings are not a consumption advisory. Mercury and PCB advice for Minnesota waters comes from MDH, and it is issued per species and per size class: a lake with clear, low-nutrient water can still carry a meal limit on larger predator fish.
Where to stay near Rock Lake
Top-rated places to stay near Rock Lake
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