Minnesota DNR fisheries surveys · latest August 4, 2025
Round Lake FishingAWater-quality grade A
Minnesota DNR surveys at Round Lake average 64.48 smallmouth bass per unit of sampling effort (CPUE) across 23 surveys. The most recent is a Targeted Survey dated August 4, 2025. Length samples in the latest survey that recorded them ran 9–18 inches. In Aitkin County, Minnesota, Round Lake carries an overall water-quality grade of A. Water clarity averages 14.5 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 Round Lake
18 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 Round 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 Round 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 Round Lake average 64.48 smallmouth bass per unit of sampling effort (CPUE) across 23 surveys. The most recent is a Targeted Survey dated August 4, 2025. Length samples in the latest survey that recorded them ran 9–18 inches.
A DNR fisheries survey reports fish abundance and catch rates, not a water-quality grade. LakeQuality grades Round Lake A from EPA Water Quality Portal chemistry, and the water-quality trend over 6 years of monitoring is stable. Catch rate is not a swim clearance and is not a weekly bite report.
DNR Fisheries Survey Summary
23 surveys on file from MN DNR Fisheries. Most recent: 2025-08-04 (Targeted Survey).
Top Species by Catch Rate
| Species | Avg catch rate (CPUE) | Avg Weight |
|---|---|---|
| Smallmouth Bass | 64.48 | 0.95 lb |
| Bluntnose Minnow | 54.76 | — |
| Tullibee (Cisco) | 18.61 | 0.52 lb |
| Largemouth Bass | 14.06 | 0.82 lb |
| Bluegill | 13.99 | 0.12 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.
Smallmouth Bass
Tullibee (Cisco)
Largemouth Bass
Bluegill
From the 2025-08-04 survey
A temperature-dissolved oxygen (TDO) profile was collected on 8/6/2025 to measure the amount of thermal habitat available for Tullibee. The TDO3 (temperature at 3 mg/l dissolved oxygen) was determined to be 5.8 degrees C and comparable to previous assessments. While water from the surface to about 17 feet was warm,…
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Round Lake. 4 reports on file.
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- —Fisheries Lake Survey — RoundFisheries Lake Survey · MN DNR LakeFinder
- —Aquatic Plant Report — Round (0061)Aquatic Plant Report · MN DNR LakeFinder
- —Fish Stocking History — RoundFish Stocking History · MN DNR LakeFinder
- —Public Water Access Sites — RoundPublic Water Access Sites · MN DNR LakeFinder
Common questions
What fish are in Round Lake?
Minnesota DNR surveys at Round Lake average 64.48 smallmouth bass per unit of sampling effort (CPUE) across 23 surveys. The most recent is a Targeted Survey dated August 4, 2025. Length samples in the latest survey that recorded them ran 9–18 inches. Minnesota DNR lists 18 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 Round Lake last surveyed?
The most recent fisheries survey on file for Round Lake is dated August 4, 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 Round Lake stocked?
Minnesota DNR publishes a stocking history for Round 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 Round Lake fishes?
A DNR fisheries survey reports fish abundance and catch rates, not a water-quality grade. LakeQuality grades Round Lake A from EPA Water Quality Portal chemistry, and the water-quality trend over 6 years of monitoring is stable. 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 Round Lake
Top-rated places to stay near Round Lake
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