Rose Lake
Rose Lake in Cook County, Minnesota is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 14.6 ft visibility. Maximum depth: 130 ft. Surface area: 476.95 acres.
- Clarity
- 14.6 ft
- Max depth
- 130 ft
- Area
- 477 acres
- Trend
- ↓ Declining
- Public access
- No
Next lake in Cook County
Why Rose Lake has no grade
We grade a lake only when its monitoring record clears the evidence bar: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For Rose Lake, 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. Sampling here has recorded water clarity, but not phosphorus and algae (chlorophyll-a).
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. Everything below that has been measured is still reported on this page.
Sampling is run by MPCA and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Rose Lake is a 477-acre lake in Cook County, Minnesota with a maximum depth of 130 feet (47-foot average). Overall water quality is declining over recent sampling years. The lake supports 5 documented fish species including cisco species, green sunfish, and lake trout. No public access — the lake is private or restricted.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2025-07-01. Grade methodology: LakeGrade methodology.
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Swimming Safety
Not ratedLimited data
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Rose Lake
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Good clarity, visible to about 14.6 ft. Trophic State Index: 38.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 14.6 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 38 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
Where to stay near Rose Lake
Compare lakeside cabins, hotels, and vacation rentals near Rose Lake in Cook County, Minnesota — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.
Top-rated places to stay near Rose Lake
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Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 130 ft |
| Average Depth | 46.8 ft |
| Surface Area | 477 acres |
| Shoreline Length | 7.6 mi |
| Littoral Zone | 31% |
| Public Access | No |
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Fish Species
Click a species to see every graded lake where it is documented.
Fishing Rose Lake
DNR Fisheries Survey Summary
7 surveys on file from MN DNR Fisheries. Most recent: 2025-08-11 (Targeted Survey).
Top Species by Catch Rate
| Species | Avg CPUE | Avg Weight |
|---|---|---|
| Tullibee (Cisco) | 12.04 | 0.74 lb |
| CIS | 11.75 | 0.78 lb |
| Green Sunfish | 3.40 | 0.11 lb |
| White Sucker | 3.33 | 2.41 lb |
| Yellow Perch | 3.25 | 0.31 lb |
| Lake Trout | 2.05 | 2.52 lb |
CPUE = catch per unit effort, averaged across surveys (excludes juvenile shoreline seining). Higher CPUE = more abundant in standardized sampling.
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.
Tullibee (Cisco)
CIS
Green Sunfish
White Sucker
From the 2025-08-11 survey
Temperature and dissolved oxygen (DO) measurements were collected from the deepest basin in Duncan Lake on August 11th, 2025, 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 (Cisco, also known…
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Rose Lake. 1 report on file.
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- —Fisheries Lake Survey — DuncanFisheries Lake Survey · MN DNR LakeFinder
Water Quality Trend: ↓ Declining
Based on 3 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.213 m/yr | 3 |
Graded lakes near Rose Lake
Rose Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Cook County
Frequently asked questions about Rose Lake
What is the water quality grade for Rose Lake?
- Rose Lake in Cook County, Minnesota is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 14.6 ft visibility. Maximum depth: 130 ft. Surface area: 476.95 acres.
Is Rose Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Rose Lake is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
How deep is Rose Lake?
- Rose Lake has a maximum depth of 130 feet and an average depth of 46.8 feet. The lake covers 476.95 acres.
What fish are in Rose Lake?
- Fish species found in Rose Lake include cisco species, green sunfish, lake trout, smallmouth bass, white sucker. Rose Lake is located in Cook County, Minnesota.
Explore Rose Lake across LakeGrade
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Where this data comes from
5 measurements from 2 monitoring stations, 2020–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Minnesota Pollution Control Agency - Ambient Surface Water
MNPCA5 samples · 2020–2025
Analytical methods
- Field measurement/observation, generic method
Monitoring station identifiers (2)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.
Other records on this page
Lake size & watershed from HydroLAKES (HydroSHEDS)
Lake details from Minnesota DNR LakeFinder