Roberts Lake
Forest County, Wisconsin435 acresView mapDirections
Wisconsin DNR publishes the water-quality measurements for Roberts Lake. Here is what has been measured.
- Mesotrophic
- 2 aquatic invasives
- 31 ft max depth
- Public access
- Limited data
Roberts Lake in Forest County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 11.7 ft visibility. Phosphorus: 11.1 µg/L. Maximum depth: 31 ft. Surface area: 435 acres.
Wisconsin DNR rates Musky and Walleye as abundant on Roberts Lake. DNR survey details →
Roberts Lake is a 435-acre mesotrophic lake in Forest County, Wisconsin with a maximum depth of 31 feet. 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 1 public boat landing. Compared to the 22 other monitored lakes in Forest County, Roberts Lake ranks #15 for water quality.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2026-06-06. Methodology: how these readings are compared.
Roberts Lake covers about 440 acres in Forest County. It has one public boat landing. Vrbo is where to look for cabins and lake homes around Roberts Lake, and Booking.com and Expedia search hotels near the lake for your dates.
What Roberts Lake is good for
From access and monitoring records, not editorial picks.
- Clear water11.7 ft of visibility
- Boat launch1 documented ramp
- Fishing6 species recorded
- Deep water31 ft surveyed max depth
Swimming conditions
Readings onlyLimited data
Based on clarity and algae readings from past sampling — there is no live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Roberts Lake is safe to swim in today is a call for the Wisconsin Department of Natural Resources and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Roberts Lake
These are the measurements Wisconsin DNR publishes for Roberts Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Good clarity, visible to about 11.7 ft. Phosphorus 11.1 µg/L. TSI 40.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 11.7ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 11.1µg/L | Good GoodFairPoor |
| Chlorophyll-a (algae) | No reading The green pigment in algae — a direct measure of how much algae is in the water. | |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 40 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Roberts Lake
Answers come straight from the public measurements and survey records on this page.
Wisconsin DNR rates Musky and Walleye as abundant on Roberts Lake.
A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Roberts Lake’s water-quality measurements separately, and the water-quality trend over 6 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 1995. 1 station on file (most recent sample 2025).
Fish Species (DNR-rated)
DNR Reports & Resources
Wisconsin DNR Fisheries scientists publish multi-year survey reports for Roberts Lake covering fish populations, stocking, water quality, and management. 1 report on file.
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- 2022Roberts Lake fisheries summary, 2022Fisheries Survey · WI DNR · 2022 (PDF)
Lake Details
Max depth
31 ft
Surface area
435 acres
Public access
Yes
Listed by Wisconsin DNR
Lake Size & Watershed
Watershed (drainage) area
8 sq mi
HydroLAKES / HydroSHEDS
Shoreline
4.8 mi
HydroLAKES / HydroSHEDS
Elevation
1,585 ft
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Recreation & Access
- Roberts LakePublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Stays via Stay22
Stays near Roberts Lake
Compare lakeside cabins, hotels, and vacation rentals near Roberts Lake in Forest 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 Roberts Lake
Prices for Oct 9–11, 4 adults. Change dates on the map below.
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a whole trip? See where to stay at Wisconsin’s top lakes →
Follow Roberts Lake’s readings
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Fish Species
Click a species to see every lake where it is documented.
Fishing Roberts 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 6 years of monitoring (2020–2026).
Water clarity
Improving5 years
Phosphorus
Improving-0.85 µg/L/yr3 years
Nearby Lakes in Forest County
Frequently asked questions about Roberts Lake
Where is Roberts Lake?
- Roberts Lake is a lake in Forest County, Wisconsin. Its water-quality measurements are published by Wisconsin DNR and shown on this page as reported.
What is the water quality of Roberts Lake?
- Roberts Lake in Forest County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 11.7 ft visibility. Phosphorus: 11.1 µg/L. Maximum depth: 31 ft. Surface area: 435 acres.
Is Roberts Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Roberts Lake?
- Roberts Lake has a maximum depth of 31 feet. The lake covers 435 acres.
What fish are in Roberts Lake?
- Fish species found in Roberts Lake include Musky, Panfish, Largemouth Bass, Smallmouth Bass, Northern Pike, Walleye. Roberts Lake is located in Forest County, Wisconsin.
What did the DNR fisheries survey find at Roberts Lake?
- Wisconsin DNR rates Musky and Walleye as abundant on Roberts Lake. A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Roberts Lake’s water-quality measurements separately, and the water-quality trend over 6 years of monitoring is improving. Catch rate is not a swim clearance and is not a weekly bite report.
Are there boat ramps on Roberts Lake?
- Roberts Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Roberts Lake. Public access is listed as yes.
Can I fish at Roberts Lake?
- Roberts Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by Wisconsin's fish and wildlife agency, so check its current regulations before you go.
Explore Roberts Lake across LakeQuality
Depth, room, public access, and the state wake-sport rules
Fish species and the cleanest lakes across Wisconsin
Fish species and best lakes in Forest County
Species activity outlook by water temperature and season
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Where to stay at Wisconsin's top lakes, each with its readings
Lakes in the Wolf River Watershed, ranked by water quality
Wisconsin's cleanest lakes, ranked on agency measurements
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Mesotrophic Lakes in Wisconsin
Compare Roberts Lake With Nearby Lakes
Where this data comes from
28 measurements from 1 monitoring station, 2020–2026. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Wisconsin Department of Natural Resources
WIDNR_WQX28 samples · 2020–2026
Analytical methods
- Phosphorus by Colorimetry
Monitoring station identifiers (1)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.
Other records on this page
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