Lake of the Clouds
Lake County, MinnesotaLimited DataMesotrophic
Lake of the Clouds comes in at a B on the grading rubric — a respectable showing for a Minnesota lake of its size and depth.
A TSI near 41 places Lake of the Clouds in the mesotrophic band — moderate productivity, with seasonal swings between clearer spring water and richer late-summer conditions. At 110 ft of maximum depth, Lake of the Clouds stratifies reliably through the summer — the hypolimnion stays cooler and clearer than the surface layer suggests. The lake is compact at 29 acres, with 1.5 miles of shoreline and little volume to buffer nutrient inputs. Among the 142 graded lakes in Lake County, Lake of the Clouds sits at rank 67, above the county median.
Lake of the Clouds has no invasive species recorded in Minnesota state databases as of 2022, though prevention practices still apply at all access points. The state fisheries records do not list documented species for Lake of the Clouds, which usually reflects a lack of formal fisheries survey work rather than an empty lake. No formal public access is documented at Lake of the Clouds — most use is by shoreline residents and their guests. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2022-07-03. Grade methodology: LakeGrade methodology.
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Swimming Safety
Good for swimming, clear water with low algae levels
Water Quality Grade: B, Good
Good clarity, visible to about 12 ft. Trophic State Index: 41.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 12 ft | B |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 41 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 110 ft |
| Surface Area | 28.56 acres |
| Shoreline Length | 1.5 mi |
| Littoral Zone | 49% |
| Public Access | No |
Water Quality Trend: ↓ Declining
Based on 4 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.693 m/yr | 4 |
Location
County Ranking
Ranked #67 of 142 lakes in Lake County
Nearby Lakes in Lake County
More Minnesota Lake Rankings
Other Grade B Lakes in Minnesota
Mesotrophic Lakes in Minnesota
DNR Fisheries Survey Summary
3 surveys on file from MN DNR Fisheries. Most recent: 2025-07-31 (Targeted Survey).
Top Species by Catch Rate
| Species | Avg CPUE | Avg Weight |
|---|---|---|
| White Sucker | 4.33 | 0.88 lb |
| Green Sunfish | 2.00 | 0.1 lb |
CPUE = catch per unit effort, averaged across surveys (excludes juvenile shoreline seining). Higher CPUE = more abundant in standardized sampling.
From the 2025-07-31 survey
Temperature and dissolved oxygen measurements were collected from the deepest basin in Lake of the Clouds Lake on July 31st, 2025. This was done to evaluate the quantity and quality of cold, oxygenated water (i.e., oxythermal habitat) available to Lake Trout, the most sensitive coldwater species present in this lake.…
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Lake of the Clouds. 1 report on file.
- —Fisheries Lake Survey — Lake of the CloudsFisheries Lake Survey · MN DNR LakeFinder
EPA Impairment Status
Lake of the Clouds is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
Source: EPA ATTAINS assessment unit MN38-0166-00 · Official waterbody report · Matched by proximity (1 km)
Data Sources
Water quality data from the EPA Water Quality Portal
Impairment status from EPA ATTAINS 303(d) database
Grading methodology based on Metropolitan Council standards
Lake details from Minnesota DNR LakeFinder
Most recent sample: 2022-07-03
Monitoring stations: 2