Minnesota DNR fisheries surveys · latest June 18, 2025
Little Rock Lake FishingFWater-quality grade F
Minnesota DNR surveys at Little Rock Lake average 24.35 walleye per unit of sampling effort (CPUE) across 27 surveys. The most recent is a Standard Survey dated June 18, 2025. Length samples in the latest survey that recorded them ran 4–24 inches. In Benton County, Minnesota, Little Rock Lake carries an overall water-quality grade of F. Water clarity averages 1.8 feet of visibility, and there is one public boat landing. The survey figures on this page are Minnesota DNR's own; the water-quality grade comes from EPA Water Quality Portal samples. Neither is a forecast of today's bite.
Species recorded at Little Rock Lake
21 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 Little Rock Lake
No stocking record for Little 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 Little Rock Lake. Minnesota DNR lists the public access sites, including ramp type and parking, in the documents below.
Survey results in full
Minnesota DNR surveys at Little Rock Lake average 24.35 walleye per unit of sampling effort (CPUE) across 27 surveys. The most recent is a Standard Survey dated June 18, 2025. Length samples in the latest survey that recorded them ran 4–24 inches.
A DNR fisheries survey reports fish abundance and catch rates, not a water-quality grade. LakeQuality grades Little Rock Lake F from EPA Water Quality Portal chemistry, and the water-quality trend over 6 years of monitoring is declining. Catch rate is not a swim clearance and is not a weekly bite report.
DNR Fisheries Survey Summary
27 surveys on file from MN DNR Fisheries. Most recent: 2025-06-18 (Standard Survey).
Top Species by Catch Rate
| Species | Avg catch rate (CPUE) | Avg Weight |
|---|---|---|
| Yellow Perch | 28.03 | 0.18 lb |
| Walleye | 24.35 | 1.07 lb |
| Black Bullhead | 17.86 | 0.6 lb |
| Black Crappie | 12.57 | 0.28 lb |
| Bigmouth Buffalo | 10.83 | 6.59 lb |
CPUE = catch per unit effort, averaged across surveys (excludes juvenile shoreline seining). Higher CPUE means more abundant in standardized sampling. This 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.
Yellow Perch
Walleye
Black Bullhead
Black Crappie
From the 2025-06-18 survey
Little Rock Lake (DOW# 05-0013-00; Lake Class 41) is a 1,450-acre reservoir located near Rice, Minnesota. A Minnesota Department of Natural Resources (MNDNR) owned concrete boat ramp is located rear State Highway 10 near the south end of the lake. Little Rock Lake has 10.55 miles of shoreline and a maximum depth of 17…
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Little Rock Lake. 3 reports on file.
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- —Fisheries Lake Survey — Little RockFisheries Lake Survey · MN DNR LakeFinder
- —Aquatic Plant Report — Little Rock (1980)Aquatic Plant Report · MN DNR LakeFinder
- —Public Water Access Sites — Little RockPublic Water Access Sites · MN DNR LakeFinder
Common questions
What fish are in Little Rock Lake?
Minnesota DNR surveys at Little Rock Lake average 24.35 walleye per unit of sampling effort (CPUE) across 27 surveys. The most recent is a Standard Survey dated June 18, 2025. Length samples in the latest survey that recorded them ran 4–24 inches. Minnesota DNR lists 21 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 Little Rock Lake last surveyed?
The most recent fisheries survey on file for Little Rock Lake is dated June 18, 2025. 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 Little Rock Lake stocked?
No stocking record for Little 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.
Does the water-quality grade tell me how Little Rock Lake fishes?
A DNR fisheries survey reports fish abundance and catch rates, not a water-quality grade. LakeQuality grades Little Rock Lake F from EPA Water Quality Portal chemistry, and the water-quality trend over 6 years of monitoring is declining. Catch rate is not a swim clearance and is not a weekly bite report.
Before you eat what you catch
A water-quality grade is 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 can grade well and still carry a meal limit on larger predator fish.
Where to stay near Little Rock Lake
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