Spoon Lake
Spoon Lake in Lake County, Minnesota is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 13 ft visibility. Maximum depth: 85 ft. Surface area: 255.85 acres.
- Clarity
- 13 ft
- Max depth
- 85 ft
- Area
- 256 acres
- Trend
- ↓ Declining
- Public access
- No
Next lake in Lake County
Why Spoon 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 Spoon 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.
Spoon Lake is a 256-acre lake in Lake County, Minnesota with a maximum depth of 85 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 2025-07-05. Grade methodology: LakeGrade methodology.
Watch Spoon 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 Spoon Lake
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Good clarity, visible to about 13 ft. Trophic State Index: 40.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 13 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 40 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Spoon Lake
Compare lakeside cabins, hotels, and vacation rentals near Spoon 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 Spoon Lake
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Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 85 ft |
| Surface Area | 256 acres |
| Shoreline Length | 7.5 mi |
| Littoral Zone | 34% |
| Public Access | No |
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Fishing Spoon Lake
DNR Fisheries Survey Summary
3 surveys on file from MN DNR Fisheries. Most recent: 2025-08-02 (Targeted Survey).
Top Species by Catch Rate
| Species | Avg CPUE | Avg Weight |
|---|---|---|
| LKW | 8.84 | 0.89 lb |
| Tullibee (Cisco) | 6.00 | 0.54 lb |
| White Sucker | 2.78 | 1.96 lb |
| Northern Pike | 1.39 | 3.74 lb |
| Rock Bass | 0.33 | 0.2 lb |
| Yellow Perch | 0.33 | 0.15 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.
LKW
White Sucker
Northern Pike
From the 2025-08-02 survey
Temperature and dissolved oxygen measurements were collected from the deepest basin in Spoon Lake on August 2nd, 2025. This was done to evaluate the quantity and quality of cold, oxygenated water (i.e., oxythermal habitat) available to Lake Whitefish, the most sensitive coldwater species present in this lake. Lake…
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Spoon Lake. 1 report on file.
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- —Fisheries Lake Survey — SpoonFisheries Lake Survey · MN DNR LakeFinder
Water Quality Trend: ↓ Declining
Based on 6 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.289 m/yr | 6 |
EPA Impairment Status
Spoon Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit MN38-0404-00 · Official waterbody report · Matched by proximity (1.98 km)
Nearby Lakes in Lake County
Frequently asked questions about Spoon Lake
What is the water quality grade for Spoon Lake?
- Spoon Lake in Lake County, Minnesota is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 13 ft visibility. Maximum depth: 85 ft. Surface area: 255.85 acres.
Is Spoon Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Spoon 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 Spoon Lake?
- Spoon Lake has a maximum depth of 85 feet. The lake covers 255.85 acres.
Explore Spoon Lake across LakeGrade
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Where this data comes from
22 measurements from 7 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
MNPCA22 samples · 2020–2025
Analytical methods
- Field measurement/observation, generic method
Monitoring station identifiers (7)
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