Beth Lake
Beth Lake in Cook County, Minnesota is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 11.1 ft visibility. Maximum depth: 22 ft. Surface area: 170.05 acres.
- Clarity
- 11.1 ft
- Max depth
- 22 ft
- Area
- 170 acres
- Public access
- No
Next lake in Cook County
Why Beth 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 Beth 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.
Beth Lake is a 170-acre lake in Cook County, Minnesota with a maximum depth of 22 feet. The lake supports 4 documented fish species including northern pike, smallmouth bass, and white sucker. No public access — the lake is private or restricted.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2022-07-26. 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 Beth Lake
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Good clarity, visible to about 11.1 ft. Trophic State Index: 42.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 11.1 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 42 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Beth Lake
Compare lakeside cabins, hotels, and vacation rentals near Beth 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 Beth Lake
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Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 22 ft |
| Surface Area | 170 acres |
| Shoreline Length | 4.4 mi |
| Littoral Zone | 59% |
| 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 Beth Lake
DNR Fisheries Survey Summary
2 surveys on file from MN DNR Fisheries. Most recent: 2012-08-07 (Standard Survey).
Top Species by Catch Rate
| Species | Avg CPUE | Avg Weight |
|---|---|---|
| Smallmouth Bass | 13.67 | 0.48 lb |
| White Sucker | 4.04 | 4.01 lb |
| Northern Pike | 0.83 | 0.82 lb |
| Yellow Perch | 0.25 | — |
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.
Smallmouth Bass
White Sucker
Northern Pike
Yellow Perch
From the 2012-08-07 survey
Beth Lake is 170 acres with a maximum depth of 22 feet and is located 21 miles north of Schroeder completely within the BWCAW. The lake is accessed by one of three portage routes. Alton Lake, to the east, is a 144 rod portage, or about half of a mile. Ella Lake, to the north, is a 72 rod portage, about 0.2 miles.…
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Beth Lake. 1 report on file.
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- —Fisheries Lake Survey — BethFisheries Lake Survey · MN DNR LakeFinder
Nearby Lakes in Cook County
Frequently asked questions about Beth Lake
What is the water quality grade for Beth Lake?
- Beth Lake in Cook County, Minnesota is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 11.1 ft visibility. Maximum depth: 22 ft. Surface area: 170.05 acres.
Is Beth Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Beth 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 Beth Lake?
- Beth Lake has a maximum depth of 22 feet. The lake covers 170.05 acres.
What fish are in Beth Lake?
- Fish species found in Beth Lake include northern pike, smallmouth bass, white sucker, yellow perch. Beth Lake is located in Cook County, Minnesota.
Explore Beth Lake across LakeGrade
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Where this data comes from
2 measurements from 2 monitoring stations, 2022. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Minnesota Pollution Control Agency - Ambient Surface Water
MNPCA2 samples · 2022
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