Boot Lake
Boot Lake in Lake County, Minnesota is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 16.5 ft visibility. Maximum depth: 83 ft. Surface area: 197.07 acres.
- Clarity
- 16.5 ft
- Max depth
- 83 ft
- Area
- 197 acres
- Trend
- ↓ Declining
- Public access
- No
Next lake in Lake County
Why Boot 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 Boot 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.
Boot Lake is a 197-acre lake in Lake County, Minnesota with a maximum depth of 83 feet. Overall water quality is declining over recent sampling years. Limited fish-species data available. No public access — the lake is private or restricted.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2023-09-09. Grade methodology: LakeGrade methodology.
Watch Boot Lake water quality
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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 Boot Lake
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Crystal clear, you can see 16.5 ft down. Trophic State Index: 37.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 16.5 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 37 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
Where to stay near Boot Lake
Compare lakeside cabins, hotels, and vacation rentals near Boot Lake in Lake 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 Boot Lake
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Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 83 ft |
| Surface Area | 197 acres |
| Shoreline Length | 4.6 mi |
| Littoral Zone | 68% |
| Public Access | No |
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Fishing Boot Lake
DNR Fisheries Survey Summary
5 surveys on file from MN DNR Fisheries. Most recent: 2025-07-31 (Targeted Survey).
Top Species by Catch Rate
| Species | Avg CPUE | Avg Weight |
|---|---|---|
| Rock Bass | 3.45 | 0.14 lb |
| CIS | 3.33 | 0.28 lb |
| Tullibee (Cisco) | 2.58 | 0.34 lb |
| Northern Pike | 2.00 | 4.26 lb |
| Walleye | 1.89 | 2.44 lb |
| White Sucker | 1.78 | 2.98 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.
Rock Bass
CIS
Northern Pike
Walleye
From the 2025-07-31 survey
Temperature and dissolved oxygen (DO) measurements were collected from the deepest basin in Boot 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 Boot Lake. 1 report on file.
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- —Fisheries Lake Survey — BootFisheries Lake Survey · MN DNR LakeFinder
Water Quality Trend: ↓ Declining
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.347 m/yr | 5 |
EPA Impairment Status
Boot Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit MN38-0498-00 · Official waterbody report · Matched by proximity (2.61 km)
Nearby Lakes in Lake County
Frequently asked questions about Boot Lake
What is the water quality grade for Boot Lake?
- Boot Lake in Lake County, Minnesota is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 16.5 ft visibility. Maximum depth: 83 ft. Surface area: 197.07 acres.
Is Boot Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Boot 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 Boot Lake?
- Boot Lake has a maximum depth of 83 feet. The lake covers 197.07 acres.
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Where this data comes from
16 measurements from 1 monitoring station, 2020–2023. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Minnesota Pollution Control Agency - Ambient Surface Water
MNPCA16 samples · 2020–2023
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
Impairment status from EPA ATTAINS 303(d) database
Lake size & watershed from HydroLAKES (HydroSHEDS)
Lake details from Minnesota DNR LakeFinder