Lone Stone Lake
Lone Stone Lake in Oneida County, Wisconsin has a water quality grade of B (Good). Water clarity: 14.5 ft visibility. Phosphorus: 11.5 µg/L. Maximum depth: 30 ft. Surface area: 171 acres.
Wisconsin DNR lists Panfish as common on Lone Stone Lake. DNR survey details →
- Clarity
- 14.5 ft
- Typical in August
- 71°F
- Max depth
- 30 ft
- Area
- 171 acres
- Type
- Oligotrophic
- Trend
- ↑ Improving
- Public access
- Yes
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Lone Stone Lake is a 171-acre cold, clear oligotrophic lake in Oneida County, Wisconsin with a maximum depth of 30 feet. Water quality is graded B based on 1 sampling years through 2026. Overall water quality is improving over recent sampling years. The lake supports 6 documented fish species including Musky, Panfish, and Largemouth Bass. Public access is available with 3 public boat landings. Compared to the 66 other monitored lakes in Oneida County, Lone Stone Lake ranks #42 for water quality.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2026-04-26. Grade methodology: LakeQuality methodology.
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Swimming Safety
Grade onlyLow algae
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Good for swimming, clear water with low algae levels
Water Quality Grade: B (Good)
Good clarity, visible to about 14.5 ft. Phosphorus level: 11.5 µg/L. Trophic State Index: 39.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 14.5 ft | Not graded |
| Phosphorus | 11.5 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 39 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
Where to stay near Lone Stone Lake
Compare lakeside cabins, hotels, and vacation rentals near Lone Stone Lake in Oneida County, Wisconsin — 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 Lone Stone Lake
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Planning a whole trip? See where to stay at Wisconsin’s top lakes →
Water Temperature
Lone Stone Lake typically sits around 71°F at the surface in August. Summer average is about 72°F. Usually warmest in Jul (about 75°F) and coldest in Apr (about 45°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 10 field readings (2024–2025) via the EPA Water Quality Portal. See the full Lone Stone Lake water temperature breakdown →
Wisconsin DNR lists Panfish as common on Lone Stone Lake.
A DNR fisheries survey reports fish abundance and catch rates, not a water-quality grade. LakeQuality grades Lone Stone Lake B from EPA Water Quality Portal chemistry, and the water-quality trend over 7 years of monitoring is improving. Catch rate is not a swim clearance and is not a weekly bite report.
WI DNR Lake Profile
Authoritative data from the Wisconsin DNR LakePages. Monitored by volunteers since 1994. 1 station on file (most recent sample 2025).
Fish Species (DNR-rated)
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 30 ft |
| Surface Area | 171 acres |
| Public Access | Yes |
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Recreation & Access
- Sevenmile LakePublic
- Sevenmile LakePublic
- Lone Stone LakePublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fish Species
Click a species to see every graded lake where it is documented.
Fishing Lone 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.
Water Quality Trend: ↑ Improving
Based on 7 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.368 m/yr | 7 |
| Phosphorus | ↑ Improving | -1.85 µg/L/yr | 4 |
EPA Impairment Status
Lone 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
Source: EPA ATTAINS assessment unit WI10007283 · Official waterbody report · Matched by proximity (2.22 km)
County Ranking
Ranked #42 of 67 lakes in Oneida County
Nearby Lakes in Oneida County
Frequently asked questions about Lone Stone Lake
Where is Lone Stone Lake?
- Lone Stone Lake is a lake in Oneida County, Wisconsin. LakeQuality grades it B for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Lone Stone Lake?
- Lone Stone Lake in Oneida County, Wisconsin has a water quality grade of B (Good). Water clarity: 14.5 ft visibility. Phosphorus: 11.5 µg/L. Maximum depth: 30 ft. Surface area: 171 acres.
Is Lone Stone Lake safe to swim in?
- Good for swimming, clear water with low algae levels. Lone Stone Lake has a water quality grade of B (Good). Always check local health department advisories before swimming.
What is the water temperature of Lone Stone Lake?
- Lone Stone Lake typically sits around 71°F at the surface in August, from 10 EPA Water Quality Portal field readings (2024–2025). That is a typical value for the month, not a live reading.
How deep is Lone Stone Lake?
- Lone Stone Lake has a maximum depth of 30 feet. The lake covers 171 acres.
What fish are in Lone Stone Lake?
- Fish species found in Lone Stone Lake include Musky, Panfish, Largemouth Bass, Smallmouth Bass, Northern Pike, Walleye. Lone Stone Lake is located in Oneida County, Wisconsin.
What did the DNR fisheries survey find at Lone Stone Lake?
- Wisconsin DNR lists Panfish as common on Lone Stone Lake. A DNR fisheries survey reports fish abundance and catch rates, not a water-quality grade. LakeQuality grades Lone Stone Lake B from EPA Water Quality Portal chemistry, and the water-quality trend over 7 years of monitoring is improving. Catch rate is not a swim clearance and is not a weekly bite report.
Are there boat ramps on Lone Stone Lake?
- Lone Stone Lake has 3 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Sevenmile Lake, Sevenmile Lake, Lone Stone Lake. Public access is listed as yes.
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Where this data comes from
49 measurements from 1 monitoring station, 2021–2026. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Wisconsin Department of Natural Resources
WIDNR_WQX49 samples · 2021–2026
Analytical methods
- Phosphorus by Colorimetry
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)
Fish and recreation data from Wisconsin DNR Lakes
Named boat-access points from the USGS National Boat Ramps inventory