Peter Lake
Peter Lake in Cook County, Minnesota is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 22.5 ft visibility. Maximum depth: 120 ft. Surface area: 281.98 acres.
- Clarity
- 22.5 ft
- Max depth
- 120 ft
- Area
- 282 acres
- Public access
- No
Next lake in Cook County
Why Peter 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 Peter Lake, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). 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.
Peter Lake is a 282-acre lake in Cook County, Minnesota with a maximum depth of 120 feet. The lake supports 4 documented fish species including burbot, lake trout, and white sucker. No public access — the lake is private or restricted.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2020-08-02. 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 Peter Lake
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Crystal clear, you can see 22.5 ft down. Trophic State Index: 32.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 22.5 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 32 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
Where to stay near Peter Lake
Compare lakeside cabins, hotels, and vacation rentals near Peter 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.
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Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 120 ft |
| Surface Area | 282 acres |
| Shoreline Length | 6.7 mi |
| Littoral Zone | 25% |
| 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 Peter Lake
DNR Fisheries Survey Summary
4 surveys on file from MN DNR Fisheries. Most recent: 2024-08-06 (Targeted Survey).
Top Species by Catch Rate
| Species | Avg CPUE | Avg Weight |
|---|---|---|
| White Sucker | 11.35 | 1.72 lb |
| Lake Trout | 10.86 | 1.08 lb |
| Yellow Perch | 1.03 | 0.13 lb |
| BUB | 0.74 | 0.58 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.
White Sucker
Lake Trout
Yellow Perch
BUB
From the 2024-08-06 survey
Temperature and dissolved oxygen measurements were collected in the deepest basin in Peter Lake on August 6, 2024, 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. During the summer, Lake Trout…
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Peter Lake. 1 report on file.
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- —Fisheries Lake Survey — PeterFisheries Lake Survey · MN DNR LakeFinder
Nearby Lakes in Cook County
Frequently asked questions about Peter Lake
What is the water quality grade for Peter Lake?
- Peter Lake in Cook County, Minnesota is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 22.5 ft visibility. Maximum depth: 120 ft. Surface area: 281.98 acres.
Is Peter Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Peter 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 Peter Lake?
- Peter Lake has a maximum depth of 120 feet. The lake covers 281.98 acres.
What fish are in Peter Lake?
- Fish species found in Peter Lake include burbot, lake trout, white sucker, yellow perch. Peter Lake is located in Cook County, Minnesota.
Explore Peter Lake across LakeGrade
Depth, room, public access, and the state wake-sport rules
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Fish species and best lakes in Cook County
Species activity outlook by water temperature and season
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Where this data comes from
1 measurement from 1 monitoring station, 2020. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Minnesota Pollution Control Agency - Ambient Surface Water
MNPCA1 sample · 2020
Analytical methods
- Field measurement/observation, generic method
Monitoring station identifiers (1)
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