Round Lake
Beltrami County, Minnesota181 acresView mapDirections
Minnesota PCA publishes the water-quality measurements for Round Lake. Here is what has been measured.
- Oligotrophic
- 38 ft max depth
Round Lake in Beltrami County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Water clarity: 18 ft visibility. Phosphorus: 7 µg/L. Chlorophyll-a (algae): 1.9 µg/L. Maximum depth: 38 ft. Surface area: 181.06 acres.
Minnesota DNR's Standard Survey on August 29, 1979 caught 2.00 walleye per gill net at Round Lake. DNR survey details →
Round Lake is a 181-acre cold, clear oligotrophic lake in Beltrami County, Minnesota with a maximum depth of 38 feet. Overall water quality is improving over recent sampling years. Limited fish-species data available. No public access — the lake is private or restricted. Compared to the 84 other monitored lakes in Beltrami County, Round Lake ranks #3 for water quality.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2025-09-17. Methodology: how these readings are compared.
What Round Lake is good for
From access and monitoring records, not editorial picks.
- Clear water18 ft of visibility
- Deep water38 ft surveyed max depth
Swimming conditions
Readings onlyLow algae
Based on clarity and algae readings from past sampling — there is no live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Round Lake is safe to swim in today is a call for the Minnesota Pollution Control Agency and the Minnesota DNR and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Round Lake
These are the measurements Minnesota PCA publishes for Round Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Crystal clear, you can see 18 ft down. Phosphorus 7 µg/L. Chlorophyll-a 1.9 µg/L. TSI 35.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 18ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 7µg/L | Good GoodFairPoor |
| Chlorophyll-a (algae) | 1.9µg/L | Good GoodFairPoor |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 35 | Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Low nutrients, clear water. No reading is a swimming clearance.
Ask about Round Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Round Lake typically sits around 64°F at the surface in September. Summer average is about 73°F. Usually warmest in Jul (about 75°F) and coldest in Jan (about 32°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (32°F) to its warmest (75°F).
Typical surface water temperature by month, from 75 field readings (2010–2025) via the EPA Water Quality Portal. See the full Round Lake water temperature breakdown →
Minnesota DNR's Standard Survey on August 29, 1979 caught 2.00 walleye per gill net at Round Lake.
A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Round Lake’s water-quality measurements separately, and the water-quality trend over 6 years of monitoring is improving. Catch rate is not a swim clearance and is not a weekly bite report.
DNR Fisheries Survey Summary
1 survey on file from MN DNR Fisheries. Most recent: 1979-08-29 (Standard Survey).
1 survey on file · most recent 1979-08-29 (Standard Survey)
47 years old| Species | Catch rate (CPUE) | Size | Avg weight |
|---|---|---|---|
| Rock Bass | 12.25 | 0.1 lb | |
| Yellow Perch | 8.75 | 0.12 lb | |
| White Sucker | 8.00 | 0.98 lb | |
| Pumpkinseed | 7.88 | 0.15 lb | |
| Bluegill | 6.25 | 0.08 lb | |
| Largemouth Bass | 6.13 | 0.67 lb |
CPUE = catch per unit effort, fish caught per net per set in a standardised survey. It measures abundance, not size, and is not a weekly bite report.
From the 1979-08-29 survey
Walleye, Yel Perch and N Pike pop. are about 1/2 of the cty mean and only lrg sized fish were capt. The LM Bass pop. is about 20 times lrgr than the cty mean. Bluegill and Pumpkinseed pop.s are 6 & 9 times respectively lrgr than the cty mean. The Rock Bass pop. is 8 times larger than the cty mean
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Round Lake. 1 report on file.
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- —Fisheries Lake Survey — SylviaFisheries Lake Survey · MN DNR LakeFinder
Lake Details
Max depth
38 ft
Surface area
181 acres
Shoreline
2.2 mi
Littoral zone
30%
Share shallower than 15 ft
Public access
No
Listed by Minnesota PCA
Lake Size & Watershed
Watershed (drainage) area
23 sq mi
HydroLAKES / HydroSHEDS
Elevation
1,250 ft
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Stays via Stay22
Stays near Round Lake
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Fishing Round Lake
Water Quality Trend: Improving
Based on 6 years of monitoring (2020–2025).
Water clarity
Stable6 years
Phosphorus
Improving-0.49 µg/L/yr6 years
Chlorophyll-a
Improving-0.11 µg/L/yr6 years
Nearby Lakes in Beltrami County
Frequently asked questions about Round Lake
Where is Round Lake?
- Round Lake is a lake in Beltrami County, Minnesota. Its water-quality measurements are published by Minnesota PCA and shown on this page as reported.
What is the water quality of Round Lake?
- Round Lake in Beltrami County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Water clarity: 18 ft visibility. Phosphorus: 7 µg/L. Chlorophyll-a (algae): 1.9 µg/L. Maximum depth: 38 ft. Surface area: 181.06 acres.
Is Round Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
What is the water temperature of Round Lake?
- Round Lake typically sits around 64°F at the surface in September, from 75 EPA Water Quality Portal field readings (2010–2025). That is a typical value for the month, not a live reading.
How deep is Round Lake?
- Round Lake has a maximum depth of 38 feet. The lake covers 181.06 acres.
What did the DNR fisheries survey find at Round Lake?
- Minnesota DNR's Standard Survey on August 29, 1979 caught 2.00 walleye per gill net at Round Lake. A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Round Lake’s water-quality measurements separately, and the water-quality trend over 6 years of monitoring is improving. Catch rate is not a swim clearance and is not a weekly bite report.
Can I fish at Round Lake?
- Public access to Round Lake is listed as no on the lake record, so confirm before you make the trip. Seasons, size and bag limits, and whether you need a license are set by Minnesota's fish and wildlife agency, so check its current regulations before you go.
Explore Round Lake across LakeQuality
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Species activity outlook by water temperature and season
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Minnesota's cleanest lakes, ranked on agency measurements
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Where this data comes from
98 measurements from 1 monitoring station, 2020–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Red Lake DNR
REDLAKE_WQX98 samples · 2020–2025
Analytical methods
- Phosphorus by Two Reagent Colorimetry
- 10200 H ~ Chlorophyll a-b-c Determination
- Turbidity by Nephelometry
Monitoring station identifiers (1)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.
Other records on this page
Lake size & watershed from HydroLAKES (HydroSHEDS)
Lake details from Minnesota DNR LakeFinder