Wolf Lake
Portage County, Wisconsin22 acresView mapDirections
Wisconsin DNR publishes the water-quality measurements for Wolf Lake. Here is what has been measured.
- Impaired · Nutrients (phosphorus, nitrogen)
- Purple Loosestrife
- 17 ft max depth
- Public access
- Limited data
Wolf Lake in Portage County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 9 ft visibility. Maximum depth: 17 ft. Surface area: 22 acres.
Wisconsin DNR lists Largemouth Bass as common on Wolf Lake. DNR survey details →
Wolf Lake is a 22-acre lake in Portage County, Wisconsin with a maximum depth of 17 feet. Overall water quality is improving over recent sampling years. The lake supports 4 documented fish species including Panfish, Largemouth Bass, and Northern Pike. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2026-06-18. Methodology: how these readings are compared.
What Wolf Lake is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
- Fishing4 species recorded
Swimming conditions
No readingRecreation use not supported
Nutrient and algae readings are not a swimming clearance. Wolf Lake is listed impaired under Clean Water Act §303(d) (IR 5) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
Whether Wolf 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 Wolf Lake
These are the measurements Wisconsin DNR publishes for Wolf Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Moderate clarity, visible to about 9 ft. TSI 45.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 9ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | No reading The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. | |
| 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. | 45 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Wolf Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Wolf Lake typically sits around 70°F at the surface in September. Summer average is about 76°F. Usually warmest in Jul (about 80°F) and coldest in Feb (about 38°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (38°F) to its warmest (80°F).
Typical surface water temperature by month, from 36 field readings (2024–2026) via the EPA Water Quality Portal. See the full Wolf Lake water temperature breakdown →
Wisconsin DNR lists Largemouth Bass as common on Wolf Lake.
A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Wolf Lake’s water-quality measurements separately, and the water-quality trend over 5 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 2011. 1 station on file (most recent sample 2026).
Fish Species (DNR-rated)
Lake Details
Max depth
17 ft
Surface area
22 acres
Public access
Yes
Listed by Wisconsin DNR
Lake Size & Watershed
Watershed (drainage) area
1 sq mi
HydroLAKES / HydroSHEDS
Shoreline
0.9 mi
HydroLAKES / HydroSHEDS
Elevation
1,099 ft
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Recreation & Access
- Wolf Lake ParkPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Stays via Stay22
Stays near Wolf Lake
Compare lakeside cabins, hotels, and vacation rentals near Wolf Lake in Portage 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 Wolf Lake
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Follow Wolf Lake’s readings
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Fish Species
Click a species to see every lake where it is documented.
Fishing Wolf 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 5 years of monitoring (2021–2026).
Water clarity
Improving5 years
EPA Impairment Status
Wolf Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
Designated uses not supporting: Aquatic life, Recreation.
Source: EPA ATTAINS assessment unit WI10009391 · Official waterbody report
Nearby Lakes in Portage County
Frequently asked questions about Wolf Lake
Where is Wolf Lake?
- Wolf Lake is a lake in Portage County, Wisconsin. Its water-quality measurements are published by Wisconsin DNR and shown on this page as reported.
What is the water quality of Wolf Lake?
- Wolf Lake in Portage County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 9 ft visibility. Maximum depth: 17 ft. Surface area: 22 acres.
Is Wolf Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Wolf Lake is listed impaired under Clean Water Act §303(d) (IR 5) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
What is the water temperature of Wolf Lake?
- Wolf Lake typically sits around 70°F at the surface in September, from 36 EPA Water Quality Portal field readings (2024–2026). That is a typical value for the month, not a live reading.
How deep is Wolf Lake?
- Wolf Lake has a maximum depth of 17 feet. The lake covers 22 acres.
What fish are in Wolf Lake?
- Fish species found in Wolf Lake include Panfish, Largemouth Bass, Northern Pike, Walleye. Wolf Lake is located in Portage County, Wisconsin.
What did the DNR fisheries survey find at Wolf Lake?
- Wisconsin DNR lists Largemouth Bass as common on Wolf Lake. A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Wolf Lake’s water-quality measurements separately, and the water-quality trend over 5 years of monitoring is improving. Catch rate is not a swim clearance and is not a weekly bite report.
Are there boat ramps on Wolf Lake?
- Wolf Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Wolf Lake Park. Public access is listed as yes.
Can I fish at Wolf Lake?
- Wolf 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 Wolf Lake across LakeQuality
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Where this data comes from
15 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_WQX15 samples · 2021–2026
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
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