Little Round Lake
Little Round Lake in Sawyer County, Wisconsin has a water quality grade of A (Excellent). Water clarity: 17.3 ft visibility. Phosphorus: 12 µg/L. Chlorophyll-a (algae): 1 µg/L. Maximum depth: 38 ft. Surface area: 179 acres.
- Clarity
- 17.3 ft
- Max depth
- 38 ft
- Area
- 179 acres
- Type
- Oligotrophic
- Trend
- → Stable
Next lake in Sawyer County
Little Round Lake is a 179-acre cold, clear oligotrophic lake in Sawyer County, Wisconsin with a maximum depth of 38 feet. Water quality is graded A based on 2 sampling years through 2025. Water clarity is improving over recent sampling years. The lake supports 6 documented fish species including Musky, Panfish, and Largemouth Bass. Compared to the 44 other monitored lakes in Sawyer County, Little Round Lake ranks #10 for water quality.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2025-08-04. Grade methodology: LakeGrade 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.
Excellent for swimming, crystal clear water with minimal algae
Water Quality Grade: A (Excellent)
Crystal clear, you can see 17.3 ft down. Phosphorus level: 12 µg/L. Chlorophyll-a: 1 µg/L. Trophic State Index: 36.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 17.3 ft | Not graded |
| Phosphorus | 12 µg/L | Good |
| Chlorophyll-a (Algae) | 1 µg/L | Good |
| Trophic State Index (TSI) | 36 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
Where to stay near Little Round Lake
Compare lakeside cabins, hotels, and vacation rentals near Little Round Lake in Sawyer 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.
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Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 38 ft |
| Surface Area | 179 acres |
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 Little Round 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.
WI DNR Lake Profile
Authoritative data from the Wisconsin DNR LakePages. Monitored by volunteers since 2025. 2 stations on file (most recent sample 2025).
Fish Species (DNR-rated)
Water Quality Trend: → Stable
Based on 7 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.623 m/yr | 7 |
| Phosphorus | ↓ Declining | +0.96 µg/L/yr | 6 |
| Chlorophyll-a | → Stable | +0.02 µg/L/yr | 5 |
County Ranking
Ranked #10 of 45 lakes in Sawyer County
Nearby Lakes in Sawyer County
Frequently asked questions about Little Round Lake
What is the water quality grade for Little Round Lake?
- Little Round Lake in Sawyer County, Wisconsin has a water quality grade of A (Excellent). Water clarity: 17.3 ft visibility. Phosphorus: 12 µg/L. Chlorophyll-a (algae): 1 µg/L. Maximum depth: 38 ft. Surface area: 179 acres.
Is Little Round Lake safe to swim in?
- Excellent for swimming, crystal clear water with minimal algae. Little Round Lake has a water quality grade of A (Excellent). Algae concentration (chlorophyll-a) is 1 µg/L. Always check local health department advisories before swimming.
How deep is Little Round Lake?
- Little Round Lake has a maximum depth of 38 feet. The lake covers 179 acres.
What fish are in Little Round Lake?
- Fish species found in Little Round Lake include Musky, Panfish, Largemouth Bass, Smallmouth Bass, Northern Pike, Walleye. Little Round Lake is located in Sawyer County, Wisconsin.
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Where this data comes from
78 measurements from 2 monitoring stations, 2020–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Lac Courte Oreilles (Tribal)
LCOWIS_WQX73 samples · 2020–2024 - Wisconsin Department of Natural Resources
WIDNR_WQX5 samples · 2025
Analytical methods
- 4500 P E ~ Phosphorus in Water by Colorimetry- Ascorbic Acid Method
- 4500 P F ~ Phosphorus in Water by Colorimetry Automated Ascorbic Acid Method
- 2320 B ~ Alkalinity by Gran Titration
- 4500 P E ~ Phosphorus by Ascorbic Acid
- 10200 H ~ Chlorophyll a-b-c Determination
- Total Phosphorus After Block Digestion
Monitoring station identifiers (2)
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
Lake size & watershed from HydroLAKES (HydroSHEDS)
Fish and recreation data from Wisconsin DNR Lakes