Minnesota DNR fisheries surveys · latest August 14, 2025
Malberg Lake FishingNRNot rated for water quality
Minnesota DNR surveys at Malberg Lake average 4.63 walleye per unit of sampling effort (CPUE) across 3 surveys. The most recent is a Targeted Survey dated August 14, 2025. Length samples in the latest survey that recorded them ran 7–26 inches. In Lake County, Minnesota, Malberg Lake has no letter grade — no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). Water clarity averages 5.5 feet of visibility. 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.
Stocking at Malberg Lake
No stocking record for Malberg 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.
Survey results in full
Minnesota DNR surveys at Malberg Lake average 4.63 walleye per unit of sampling effort (CPUE) across 3 surveys. The most recent is a Targeted Survey dated August 14, 2025. Length samples in the latest survey that recorded them ran 7–26 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 Malberg Lake — official chemistry is on file, not a letter. Catch rate is not a swim clearance and is not a weekly bite report.
DNR Fisheries Survey Summary
3 surveys on file from MN DNR Fisheries. Most recent: 2025-08-14 (Targeted Survey).
Top Species by Catch Rate
| Species | Avg catch rate (CPUE) | Avg Weight |
|---|---|---|
| Walleye | 4.63 | 1.1 lb |
| White Sucker | 3.55 | 2.43 lb |
| Tullibee (Cisco) | 2.87 | — |
| Northern Pike | 1.23 | 4.4 lb |
| Yellow Perch | 0.83 | 0.16 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.
Walleye
White Sucker
Northern Pike
Yellow Perch
From the 2025-08-14 survey
Temperature and dissolved oxygen (DO) measurements were collected in Malberg Lake on August 14th, 2025, to evaluate the quantity and quality of cold, oxygenated water (i.e., oxythermal habitat) available to Lake Whitefish, the most sensitive coldwater species present in this lake. During the summer, Lake Whitefish…
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Malberg Lake. 1 report on file.
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- —Fisheries Lake Survey — MalbergFisheries Lake Survey · MN DNR LakeFinder
Common questions
What fish are in Malberg Lake?
Minnesota DNR surveys at Malberg Lake average 4.63 walleye per unit of sampling effort (CPUE) across 3 surveys. The most recent is a Targeted Survey dated August 14, 2025. Length samples in the latest survey that recorded them ran 7–26 inches. Those are survey results, not a catch report: a net set on one date measures what was in that net.
When was Malberg Lake last surveyed?
The most recent fisheries survey on file for Malberg Lake is dated August 14, 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 Malberg Lake stocked?
No stocking record for Malberg 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 Malberg 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 Malberg Lake — official chemistry is on file, not a letter. 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.
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