Minnesota DNR fisheries surveys · latest July 28, 2009
Johnson Lake FishingNRNot rated for water quality
Minnesota DNR surveys at Johnson Lake average 17.25 walleye per unit of sampling effort (CPUE) across 5 surveys. The most recent is a Standard Survey dated July 28, 2009. Length samples in the latest survey that recorded them ran 7–21 inches. In Lake County, Minnesota, Johnson 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 11.0 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.
Species recorded at Johnson Lake
4 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 Johnson Lake
No stocking record for Johnson 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 Johnson Lake average 17.25 walleye per unit of sampling effort (CPUE) across 5 surveys. The most recent is a Standard Survey dated July 28, 2009. Length samples in the latest survey that recorded them ran 7–21 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 Johnson Lake — official chemistry is on file, not a letter, and the water-quality trend over 4 years of monitoring is declining. Catch rate is not a swim clearance and is not a weekly bite report.
DNR Fisheries Survey Summary
5 surveys on file from MN DNR Fisheries. Most recent: 2009-07-28 (Standard Survey).
Top Species by Catch Rate
| Species | Avg catch rate (CPUE) | Avg Weight |
|---|---|---|
| Yellow Perch | 55.83 | 0.23 lb |
| White Sucker | 43.60 | 1.59 lb |
| Walleye | 17.25 | 1.01 lb |
| Smallmouth Bass | 4.15 | 0.3 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
White Sucker
Walleye
Smallmouth Bass
From the 2009-07-28 survey
Johnson is a 30.5 acre lake with a maximum depth of 24 feet and 18.1 acres (59%) of littoral area. Located about 3.5 miles southeast of Finland, MN, Johnson Lake is completely on property owned by the Wolf Ridge Environmental Learning Center (ELC). The simplistic fish community consists of: walleye, white sucker,…
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Johnson Lake. 2 reports on file.
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- —Fisheries Lake Survey — JohnsonFisheries Lake Survey · MN DNR LakeFinder
- —Aquatic Plant Report — Johnson (0652)Aquatic Plant Report · MN DNR LakeFinder
Common questions
What fish are in Johnson Lake?
Minnesota DNR surveys at Johnson Lake average 17.25 walleye per unit of sampling effort (CPUE) across 5 surveys. The most recent is a Standard Survey dated July 28, 2009. Length samples in the latest survey that recorded them ran 7–21 inches. Minnesota DNR lists 4 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 Johnson Lake last surveyed?
The most recent fisheries survey on file for Johnson Lake is dated July 28, 2009. 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 Johnson Lake stocked?
No stocking record for Johnson 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 Johnson 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 Johnson Lake — official chemistry is on file, not a letter, and the water-quality trend over 4 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 Johnson Lake
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