Stone Lake
Stone Lake in Carver County, Minnesota is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 10.5 ft visibility. Maximum depth: 30 ft. Surface area: 100.5 acres.
- Clarity
- 10.5 ft
- Typical in August
- 63°F
- Max depth
- 30 ft
- Area
- 101 acres
- Trend
- ↓ Declining
- Public access
- No
- Ice-out
- Mar 30
- Open water
- 244 days
Next lake in Carver County
Why Stone 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 Stone 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.
Stone Lake is a 101-acre lake in Carver County, Minnesota with a maximum depth of 30 feet. Overall water quality is declining over recent sampling years. The lake supports 7 documented fish species including bluegill, green sunfish, and hybrid sunfish. No public access — the lake is private or restricted.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2024-08-12. 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 Stone Lake
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Good clarity, visible to about 10.5 ft. Trophic State Index: 43.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 10.5 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 43 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Stone Lake
Compare lakeside cabins, hotels, and vacation rentals near Stone Lake in Carver 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 Stone Lake
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Water Temperature
Stone Lake typically sits around 63°F at the surface in August. Summer average is about 61°F. Usually warmest in Jul (about 63°F) and coldest in Apr (about 46°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 162 field readings (2010–2024) via the EPA Water Quality Portal. See the full Stone Lake water temperature breakdown →
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 30 ft |
| Surface Area | 101 acres |
| Shoreline Length | 1.7 mi |
| Littoral Zone | 71% |
| 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 Stone Lake
Invasive & Introduced Species
Red chips are ecologically harmful invasive species. Gray chips are stocked or introduced fish that aren't a current ecological concern.
DNR Fisheries Survey Summary
5 surveys on file from MN DNR Fisheries. Most recent: 2006-05-24 (Standard Survey).
Top Species by Catch Rate
| Species | Avg CPUE | Avg Weight |
|---|---|---|
| Black Bullhead | 194.64 | 0.14 lb |
| Green Sunfish | 18.68 | 0.08 lb |
| White Crappie | 11.62 | 0.21 lb |
| Brown Bullhead | 9.50 | 0.25 lb |
| Common Carp | 8.43 | 1.3 lb |
| Hybrid Sunfish | 7.83 | 0.01 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.
Black Bullhead
Green Sunfish
White Crappie
Brown Bullhead
From the 2006-05-24 survey
Stone Lake is a 99-acre, class 30 lake, located near Victoria in Carver County. Test netting revealed a fish community consisting of black bullhead, brown bullhead, golden shiner, green sunfish, hybrid sunfish, hybrid muskellunge, and white crappie. Winterkill is common during hard winters. Although Stone Lake borders…
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Stone Lake. 1 report on file.
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- —Fisheries Lake Survey — StoneFisheries 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 | -0.16 m/yr | 5 |
| Phosphorus | ↓ Declining | +8.55 µg/L/yr | 4 |
| Chlorophyll-a | ↓ Declining | +0.49 µg/L/yr | 4 |
Ice Season
Historical ice data from Minnesota DNR (32 observations).
Estimated open water season: 244 days
| Earliest | Latest | |
|---|---|---|
| Ice-Out | 2024-03-03 (2024) | 2018-05-01 (2018) |
| Ice-In | 2019-11-12 (2019) | 2020-12-24 (2020) |
Most recent ice-out: 2026-03-30
EPA Impairment Status
Stone 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 MN10-0041-00 · Official waterbody report · Matched by proximity (1.08 km)
Graded lakes near Stone Lake
Stone Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Carver County
Frequently asked questions about Stone Lake
What is the water quality grade for Stone Lake?
- Stone Lake in Carver County, Minnesota is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 10.5 ft visibility. Maximum depth: 30 ft. Surface area: 100.5 acres.
Is Stone Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Stone Lake is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
What is the water temperature of Stone Lake?
- Stone Lake typically sits around 63°F at the surface in August, from 162 EPA Water Quality Portal field readings (2010–2024). That is a typical value for the month, not a live reading.
How deep is Stone Lake?
- Stone Lake has a maximum depth of 30 feet. The lake covers 100.5 acres.
What fish are in Stone Lake?
- Fish species found in Stone Lake include bluegill, green sunfish, hybrid sunfish, largemouth bass, muskellunge, northern pike, yellow bullhead. Stone Lake is located in Carver County, Minnesota.
When does Stone Lake thaw?
- Stone Lake typically has ice-out around Mar 30. Ice typically forms around Nov 29. The open water season is approximately 244 days.
Explore Stone Lake across LakeGrade
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Where this data comes from
7 measurements from 1 monitoring station, 2022–2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Minnesota Pollution Control Agency - Ambient Surface Water
MNPCA7 samples · 2022–2024
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
Ice data from Minnesota DNR Climate