Minnesota DNR fisheries surveys · latest August 15, 2022
Loon Lake FishingNRNot rated for water quality
Minnesota DNR surveys at Loon Lake average 16.10 walleye per unit of sampling effort (CPUE) across 8 surveys. The most recent is a Standard Survey dated August 15, 2022. Length samples in the latest survey that recorded them ran 8–26 inches. In Blue Earth County, Minnesota, Loon Lake has no letter grade — the only measurement available is water clarity, which is not a water-quality indicator on its own — EPA's National Lakes Assessment does not grade clarity. Water clarity averages 2.0 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 Loon Lake
13 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 Loon 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
1 public boat landing is recorded on Loon 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 Loon Lake average 16.10 walleye per unit of sampling effort (CPUE) across 8 surveys. The most recent is a Standard Survey dated August 15, 2022. Length samples in the latest survey that recorded them ran 8–26 inches.
A DNR fisheries survey reports fish abundance and catch rates, not a water-quality grade. LakeQuality does not assign an A–F grade on Loon Lake — official chemistry is on file, not a letter, and the water-quality trend over 3 years of monitoring is declining. Catch rate is not a swim clearance and is not a weekly bite report.
DNR Fisheries Survey Summary
8 surveys on file from MN DNR Fisheries. Most recent: 2022-08-15 (Standard Survey).
Top Species by Catch Rate
| Species | Avg catch rate (CPUE) | Avg Weight |
|---|---|---|
| Black Bullhead | 64.32 | 0.45 lb |
| Common Carp | 29.06 | 2.93 lb |
| Black Crappie | 19.40 | 0.28 lb |
| Walleye | 16.10 | 1.11 lb |
| Yellow Perch | 11.17 | 0.21 lb |
| Bluegill | 7.09 | 0.24 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.
Black Bullhead
Common Carp
Black Crappie
Walleye
From the 2022-08-15 survey
Loon Lake is an 809-acre lake located east of the city of Lake Crystal in northwest Blue Earth County. A DNR-maintained public access is located on the south side of the lake off County Road 9. Loon Lake is shallow with a maximum depth of 7 feet with generally poor water clarity and frequent algal blooms caused by…
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Loon Lake. 3 reports on file.
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- —Fisheries Lake Survey — LoonFisheries Lake Survey · MN DNR LakeFinder
- —Fish Stocking History — LoonFish Stocking History · MN DNR LakeFinder
- —Public Water Access Sites — LoonPublic Water Access Sites · MN DNR LakeFinder
Common questions
What fish are in Loon Lake?
Minnesota DNR surveys at Loon Lake average 16.10 walleye per unit of sampling effort (CPUE) across 8 surveys. The most recent is a Standard Survey dated August 15, 2022. Length samples in the latest survey that recorded them ran 8–26 inches. Minnesota DNR lists 13 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 Loon Lake last surveyed?
The most recent fisheries survey on file for Loon Lake is dated August 15, 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 Loon Lake stocked?
Minnesota DNR publishes a stocking history for Loon 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.
Does the water-quality grade tell me how Loon Lake fishes?
A DNR fisheries survey reports fish abundance and catch rates, not a water-quality grade. LakeQuality does not assign an A–F grade on Loon Lake — official chemistry is on file, not a letter, and the water-quality trend over 3 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 Loon Lake
Top-rated places to stay near Loon Lake
Planning a trip to Loon Lake?
Get lake water-quality report cards plus the best cabin & lodging deals near Loon Lake — straight to your inbox. No spam, unsubscribe anytime.