Minnesota DNR fisheries surveys · latest October 23, 2025
Species recorded at Koronis Lake
22 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 Koronis Lake
Minnesota DNR publishes a stocking history for this lake — which species went in, how many, and in which years. Read the years: a lake stocked in one year is not necessarily stocked in the next.
Getting on the water
3 public boat landings are recorded on Koronis Lake. Minnesota DNR lists the public access sites, including ramp type and parking, in the documents below.
Survey results in full
Minnesota DNR's Standard Survey on July 29, 2024 caught 27.00 walleye per gill net at Koronis Lake. Length samples in the latest survey that recorded them ran 5–12 inches.
A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Koronis Lake’s water-quality measurements separately, 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
31 surveys on file from MN DNR Fisheries. Most recent: 2025-10-23 (Targeted Survey).
31 surveys on file · most recent 2025-10-23 (Targeted Survey)
| Species | Catch rate (CPUE) | Size | Avg weight |
|---|---|---|---|
| Yellow Perch | 33.36 | 4–9 in 2024-07-29 | 0.13 lb |
| Walleye | 29.06 | 5–12 in 2025-10-23 | 1.05 lb |
| Bluntnose Minnow | 16.84 | ||
| Bluegill | 14.58 | 3–8 in 2024-07-29 | 0.17 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.
Yellow Perch
Walleye
Bluegill
From the 2025-10-23 survey
A targeted fall night electrofishing survey was conducted for young of year "YOY" (fingerling sized) Walleye on Koronis during October 23, 2025. A targeted survey is generally used for sampling a specific kind of fish or time of year (i.e. spawning season, fall season, etc.) unlike a standard survey which samples a…
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Koronis Lake. 3 reports on file.
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- —Fisheries Lake Survey — Koronis (main lake)Fisheries Lake Survey · MN DNR LakeFinder
- —Fish Stocking History — Koronis (main lake)Fish Stocking History · MN DNR LakeFinder
- —Public Water Access Sites — Koronis (main lake)Public Water Access Sites · MN DNR LakeFinder
Common questions
What fish are in Koronis Lake?
Minnesota DNR's Standard Survey on July 29, 2024 caught 27.00 walleye per gill net at Koronis Lake. Length samples in the latest survey that recorded them ran 5–12 inches. Minnesota DNR lists 22 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 Koronis Lake last surveyed?
The most recent fisheries survey on file for Koronis Lake is dated October 23, 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 Koronis Lake stocked?
Minnesota DNR publishes a stocking history for Koronis Lake. It records which species were released, in what numbers and in which years — the source documents are linked further down this page. A lake can be stocked in some years and not others, so read the years rather than assuming an annual release.
Do the water-quality readings tell me how Koronis Lake fishes?
A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Koronis Lake’s water-quality measurements separately, 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
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 Koronis Lake
Top-rated places to stay near Koronis Lake
Prices for Oct 16–18, 4 adults. Change dates on the map below.
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