Rosalind Lake
Rosalind Lake in Vilas County, Wisconsin has a water quality grade of B (Good). Water clarity: 19.3 ft visibility. Phosphorus: 10.5 µg/L.
- Clarity
- 19.3 ft
- Typical in August
- 71°F
- Max depth
- ~22 ft est.
- Type
- Oligotrophic
- Trend
- ↑ Improving
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Rosalind Lake is a cold, clear oligotrophic lake in Vilas County, Wisconsin with an estimated average depth of about 22 feet. Water quality is graded B based on 1 sampling years through 2026. Overall water quality is improving over recent sampling years. Compared to the 102 other monitored lakes in Vilas County, Rosalind Lake ranks #11 for water quality.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2026-07-12. 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)
Crystal clear, you can see 19.3 ft down. Phosphorus level: 10.5 µg/L. Trophic State Index: 36.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 19.3 ft | Not graded |
| Phosphorus | 10.5 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 36 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
Where to stay near Rosalind Lake
Compare lakeside cabins, hotels, and vacation rentals near Rosalind Lake in Vilas 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 Rosalind Lake
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Water Temperature
Rosalind Lake typically sits around 71°F at the surface in August. Summer average is about 72°F. Usually warmest in Jul (about 78°F) and coldest in Apr (about 48°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 15 field readings (2024–2026) via the EPA Water Quality Portal. See the full Rosalind Lake water temperature breakdown →
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | ~22 ft est. |
| Average Depth | ~10 ft est. |
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Wisconsin has not published bathymetry for Rosalind Lake.
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth here is modelled, not surveyed — HydroLAKES v1.0 estimates lake depth from surrounding terrain rather than from soundings. Treat it as an approximation, and prefer a state bathymetric survey where one exists.
Recreation & Access
Public campgrounds near Rosalind Lake
- Big Lake Campground1.8 km
Nearest public campgrounds in the USGS National Map inventory, within about 3 miles. An empty list means USGS records no campground that close, which is not the same as camping being unavailable. Where the source gives an official reservation link, it is used; the cabin and hotel search does not cover campsites. More camping lakes
Fishing Rosalind Lake
Water Quality Trend: ↑ Improving
Based on 7 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | → Stable | +0.094 m/yr | 7 |
| Phosphorus | ↑ Improving | -0.28 µg/L/yr | 7 |
County Ranking
Ranked #11 of 103 lakes in Vilas County
Nearby Lakes in Vilas County
Frequently asked questions about Rosalind Lake
Where is Rosalind Lake?
- Rosalind Lake is a lake in Vilas County, Wisconsin. LakeQuality grades it B for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Rosalind Lake?
- Rosalind Lake in Vilas County, Wisconsin has a water quality grade of B (Good). Water clarity: 19.3 ft visibility. Phosphorus: 10.5 µg/L.
Is Rosalind Lake safe to swim in?
- Good for swimming, clear water with low algae levels. Rosalind Lake has a water quality grade of B (Good). Always check local health department advisories before swimming.
What is the water temperature of Rosalind Lake?
- Rosalind Lake typically sits around 71°F at the surface in August, from 15 EPA Water Quality Portal field readings (2024–2026). That is a typical value for the month, not a live reading.
How deep is Rosalind Lake?
- No published bathymetric survey covers Rosalind Lake, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 22 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate.
Are there campgrounds on Rosalind Lake?
- Rosalind Lake has 1 public campground from USGS The National Map within 5 km, including Big Lake Campground. This is a location join, not a booking. Cabins and hotels are listed separately; campsite reservations use the official link when the source provides one.
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Where this data comes from
114 measurements from 2 monitoring stations, 2020–2026. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Wisconsin Department of Natural Resources
WIDNR_WQX114 samples · 2020–2026
Analytical methods
- Phosphorus by Colorimetry
- Turbidity in Water
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)
Public campgrounds from USGS The National Map Structures, within about 3 miles