Minnesota DNR fisheries surveys · latest August 26, 2024
Loon Lake FishingAWater-quality grade A
Minnesota DNR surveys at Loon Lake average 2.03 lake trout per unit of sampling effort (CPUE) across 12 surveys. The most recent is a Standard Survey dated August 26, 2024. Length samples in the latest survey that recorded them ran 10–32 inches. In Cook County, Minnesota, Loon Lake carries an overall water-quality grade of A. Water clarity averages 17.4 feet of visibility, and the lake has public access. 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
10 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
No stocking record for Loon 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
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 2.03 lake trout per unit of sampling effort (CPUE) across 12 surveys. The most recent is a Standard Survey dated August 26, 2024. Length samples in the latest survey that recorded them ran 10–32 inches.
A DNR fisheries survey reports fish abundance and catch rates, not a water-quality grade. LakeQuality grades Loon Lake A from EPA Water Quality Portal chemistry, and the water-quality trend over 5 years of monitoring is declining. Catch rate is not a swim clearance and is not a weekly bite report.
DNR Fisheries Survey Summary
12 surveys on file from MN DNR Fisheries. Most recent: 2024-08-26 (Standard Survey).
Top Species by Catch Rate
| Species | Avg catch rate (CPUE) | Avg Weight |
|---|---|---|
| Tullibee (Cisco) | 7.29 | 0.46 lb |
| Rock Bass | 4.18 | 0.19 lb |
| Lake Trout | 2.03 | 1.33 lb |
| Smallmouth Bass | 1.46 | 0.35 lb |
| Bluegill | 1.31 | 0.19 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.
Tullibee (Cisco)
Rock Bass
Lake Trout
Smallmouth Bass
From the 2024-08-26 survey
Loon Lake is a large, 1,096-acre lake within Cook County and has a maximum depth of 202 ft. There is a small concrete boat access and two remote campsites located on the northwest side of the lake, just off the Gunflint Trail. Loon Lake is primarily managed for lake trout and smallmouth bass. In 2024, a standard…
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Loon Lake. 4 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
- —Aquatic Plant Report — Loon (1801)Aquatic Plant Report · MN DNR LakeFinder
- —Aquatic Plant Report — Loon (1834)Aquatic Plant Report · 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 2.03 lake trout per unit of sampling effort (CPUE) across 12 surveys. The most recent is a Standard Survey dated August 26, 2024. Length samples in the latest survey that recorded them ran 10–32 inches. Minnesota DNR lists 10 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 26, 2024. 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?
No stocking record for Loon 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 Loon Lake fishes?
A DNR fisheries survey reports fish abundance and catch rates, not a water-quality grade. LakeQuality grades Loon Lake A from EPA Water Quality Portal chemistry, and the water-quality trend over 5 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
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