Minnesota DNR fisheries surveys · latest July 14, 2025
Florence Lake FishingNRNot rated for water quality
Minnesota DNR surveys at Florence Lake average 18.98 largemouth bass per unit of sampling effort (CPUE) across 7 surveys. The most recent is a Targeted Survey dated July 14, 2025. Length samples in the latest survey that recorded them ran 2–16 inches. In Isanti County, Minnesota, Florence 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 8.9 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 Florence Lake
15 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 Florence 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 Florence 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 Florence Lake average 18.98 largemouth bass per unit of sampling effort (CPUE) across 7 surveys. The most recent is a Targeted Survey dated July 14, 2025. Length samples in the latest survey that recorded them ran 2–16 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 Florence Lake — official chemistry is on file, not a letter, 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
7 surveys on file from MN DNR Fisheries. Most recent: 2025-07-14 (Targeted Survey).
Top Species by Catch Rate
| Species | Avg catch rate (CPUE) | Avg Weight |
|---|---|---|
| Black Bullhead | 41.94 | 0.23 lb |
| Bluegill | 29.78 | 0.16 lb |
| Largemouth Bass | 18.98 | 0.68 lb |
| Pumpkinseed | 9.47 | 0.13 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
Bluegill
Largemouth Bass
Pumpkinseed
From the 2025-07-14 survey
A targeted survey of the nearshore fish community was conducted by Hinckley fisheries staff on Florence Lake on July 14, 2025. Nearshore sampling captured 15 species of fish: Banded Kilifish, Blacknose Shiner, Bluegill, Bowfin, Central Mudminnow, Golden Shiner, Green Sunfish, Hybrid Sunfish, Iowa Darter, Largemouth…
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Florence Lake. 4 reports on file.
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- —Fisheries Lake Survey — FlorenceFisheries Lake Survey · MN DNR LakeFinder
- —Aquatic Plant Report — Florence (1841)Aquatic Plant Report · MN DNR LakeFinder
- —Fish Stocking History — FlorenceFish Stocking History · MN DNR LakeFinder
- —Public Water Access Sites — FlorencePublic Water Access Sites · MN DNR LakeFinder
Common questions
What fish are in Florence Lake?
Minnesota DNR surveys at Florence Lake average 18.98 largemouth bass per unit of sampling effort (CPUE) across 7 surveys. The most recent is a Targeted Survey dated July 14, 2025. Length samples in the latest survey that recorded them ran 2–16 inches. Minnesota DNR lists 15 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 Florence Lake last surveyed?
The most recent fisheries survey on file for Florence Lake is dated July 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 Florence Lake stocked?
Minnesota DNR publishes a stocking history for Florence 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 Florence 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 Florence Lake — official chemistry is on file, not a letter, 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 Florence Lake
Top-rated places to stay near Florence Lake
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