Minnesota DNR fisheries surveys · latest April 23, 2025
Detroit Lake FishingAWater-quality grade A
Minnesota DNR surveys at Detroit Lake average 2057.65 muskellunge per unit of sampling effort (CPUE) across 21 surveys. The most recent is a Targeted Survey dated April 23, 2025. Length samples in the latest survey that recorded them ran 20–50 inches. In Becker County, Minnesota, Detroit Lake carries an overall water-quality grade of A. Water clarity averages 14.0 feet of visibility, and there are 3 public boat landings. 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 Detroit Lake
19 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 Detroit 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 Detroit 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 Detroit Lake average 2057.65 muskellunge per unit of sampling effort (CPUE) across 21 surveys. The most recent is a Targeted Survey dated April 23, 2025. Length samples in the latest survey that recorded them ran 20–50 inches.
A DNR fisheries survey reports fish abundance and catch rates, not a water-quality grade. LakeQuality grades Detroit Lake A from EPA Water Quality Portal chemistry, 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
21 surveys on file from MN DNR Fisheries. Most recent: 2025-04-23 (Targeted Survey).
Top Species by Catch Rate
| Species | Avg catch rate (CPUE) | Avg Weight |
|---|---|---|
| Muskellunge | 2057.65 | 13.37 lb |
| Bluegill | 36.21 | 0.15 lb |
| Yellow Bass | 9.60 | 0.57 lb |
| Bluntnose Minnow | 7.13 | — |
| Black Crappie | 6.24 | 0.42 lb |
| Pumpkinseed | 6.09 | 0.18 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.
Muskellunge
Bluegill
Yellow Bass
Black Crappie
From the 2025-04-23 survey
This assessment was conducted using large-frame trap nets set in spring to examine the sizes of mature Muskellunge in Detroit Lake. Muskellunge were first introduced into the lake in 1989, with directed Muskellunge surveys beginning on Detroit Lake in 1993. Sixteen surveys had been conducted prior to 2025. This…
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Detroit Lake. 4 reports on file.
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- —Fisheries Lake Survey — DetroitFisheries Lake Survey · MN DNR LakeFinder
- —Aquatic Plant Report — Detroit (1186)Aquatic Plant Report · MN DNR LakeFinder
- —Fish Stocking History — DetroitFish Stocking History · MN DNR LakeFinder
- —Public Water Access Sites — DetroitPublic Water Access Sites · MN DNR LakeFinder
Common questions
What fish are in Detroit Lake?
Minnesota DNR surveys at Detroit Lake average 2057.65 muskellunge per unit of sampling effort (CPUE) across 21 surveys. The most recent is a Targeted Survey dated April 23, 2025. Length samples in the latest survey that recorded them ran 20–50 inches. Minnesota DNR lists 19 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 Detroit Lake last surveyed?
The most recent fisheries survey on file for Detroit Lake is dated April 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 Detroit Lake stocked?
Minnesota DNR publishes a stocking history for Detroit 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 Detroit Lake fishes?
A DNR fisheries survey reports fish abundance and catch rates, not a water-quality grade. LakeQuality grades Detroit Lake A from EPA Water Quality Portal chemistry, 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
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 Detroit Lake
Top-rated places to stay near Detroit Lake
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