Toe Lake
St. Louis County, MinnesotaLimited DataOligotrophic
Toe Lake comes in at a B on the grading rubric — a respectable showing for a Minnesota lake of its size and depth.
A TSI value of 40 puts Toe Lake in the oligotrophic range, where biological productivity stays low and the water column remains clear. Toe Lake is unusually deep for Minnesota at 57 ft, which buffers the lake against summer warming and helps the deep water stay oxygenated. The lake's 169 acres and 2.8 miles of shoreline put it in the mid-range bucket — large enough for varied use, small enough that watershed inputs reach the whole basin. Toe Lake ranks 69 of 187 in St. Louis County — solidly in the upper half of the local distribution.
Toe Lake 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 Toe Lake, which usually reflects a lack of formal fisheries survey work rather than an empty lake. No formal public access is documented at Toe Lake — most use is by shoreline residents and their guests. Monitoring depth is thin here: the LakeGrade rubric is applied to a small number of sample years, and the grade will be revised as more data accumulates.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2022-06-18. 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 13.5 ft. Trophic State Index: 40.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 13.5 ft | B |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 40 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 57 ft |
| Surface Area | 169.04 acres |
| Shoreline Length | 2.8 mi |
| Littoral Zone | 24% |
| Public Access | No |
Location
County Ranking
Ranked #69 of 187 lakes in St. Louis County
Nearby Lakes in St. Louis County
More Minnesota Lake Rankings
Other Grade B Lakes in Minnesota
Oligotrophic Lakes in Minnesota
DNR Fisheries Survey Summary
2 surveys on file from MN DNR Fisheries. Most recent: 2025-07-31 (Targeted Survey).
Top Species by Catch Rate
| Species | Avg CPUE | Avg Weight |
|---|---|---|
| Walleye | 8.33 | 3.13 lb |
| Northern Pike | 6.00 | 3.62 lb |
| Rock Bass | 3.00 | 0.12 lb |
| Tullibee (Cisco) | 1.50 | 0.13 lb |
| Smallmouth Bass | 1.00 | 0.53 lb |
| Pumpkinseed | 0.83 | 0.04 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.
Walleye
Northern Pike
Rock Bass
Tullibee (Cisco)
From the 2025-07-31 survey
Temperature and dissolved oxygen (DO) measurements were collected from the deepest basin in Toe Lake on July 31st, 2025, to evaluate the quantity and quality of cold, oxygenated water (i.e., oxythermal habitat) available to Cisco, also known as Tullibee, 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 Toe Lake. 1 report on file.
- —Fisheries Lake Survey — ToeFisheries Lake Survey · MN DNR LakeFinder
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Lake details from Minnesota DNR LakeFinder
Most recent sample: 2022-06-18
Monitoring stations: 1