Where is Black Oak Lake?

Black Oak Lake is a lake in Langlade County, Wisconsin. Its water-quality measurements are published by Wisconsin DNR and shown on this page as reported.

How deep is Black Oak Lake?

Black Oak Lake has a maximum depth of 34 feet. The lake covers 56 acres.

What fish are in Black Oak Lake?

Fish species found in Black Oak Lake include Panfish, Largemouth Bass, Northern Pike. Black Oak Lake is located in Langlade County, Wisconsin.

Are there boat ramps on Black Oak Lake?

Black Oak Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Black Oak Lake. Public access is listed as yes.

Can I fish at Black Oak Lake?

Black Oak 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.

Black Oak Lake

Langlade County, Wisconsin56 acresView map Directions

Wisconsin DNR publishes the water-quality measurements for Black Oak Lake. Here is what has been measured.

Clarity

4.3 ft

Murkier than most

Secchi · sampled 2022

Phosphorus

29.1 µg/L

Typical for Wisconsin

Measured by Wisconsin DNR

Max depth

34 ft

Bathymetric survey

Area

56 acres

Surface area

Trend

Improving

6 years of samples

34 ft max depth
Public access
Limited data

See the measurements Directions Where to stay

Black Oak Lake in Langlade County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 4.3 ft visibility. Phosphorus: 29.1 µg/L. Maximum depth: 34 ft. Surface area: 56 acres.

Wisconsin DNR lists Panfish as present on Black Oak Lake. DNR survey details →

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Black Oak Lake is a 56-acre lake in Langlade County, Wisconsin with a maximum depth of 34 feet. Overall water quality is improving over recent sampling years. The lake supports 3 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 2022-07-31. Methodology: how these readings are compared.

What Black Oak Lake is good for

From access and monitoring records, not editorial picks.

Boat launch1 documented ramp
Fishing3 species recorded
Deep water34 ft surveyed max depth

Swimming conditions

No reading

Limited data

Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.

Whether Black Oak 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.

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Water quality measurements for Black Oak Lake

These are the measurements Wisconsin DNR publishes for Black Oak Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.

Murky, only visible to about 4.3 ft. Phosphorus 29.1 µg/L. TSI 54.

Water quality readings
Measure	Reading	Where it sits
Water clarity (Secchi depth)	4.3ft	Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer.
Total phosphorus	29.1µg/L	Measured, not scored 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.	54	Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic

High nutrients, frequent algae, reduced clarity

Ask about Black Oak Lake

Answers come straight from the public measurements and survey records on this page.

DNR fisheries survey

Wisconsin DNR lists Panfish as present on Black Oak Lake.

A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Black Oak 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. 1 station on file (most recent sample 2022).

Fish Species (DNR-rated)

Panfish(Present)Largemouth Bass(Present)Northern Pike(Present)

Contour map (PDF) →Full WI DNR LakePage →Water quality stations →

Lake Details

Max depth

34 ft

Surface area

56 acres

Public access

Yes

Listed by Wisconsin DNR

Lake Size & Watershed

Watershed (drainage) area

4 sq mi

HydroLAKES / HydroSHEDS

Shoreline

2.4 mi

HydroLAKES / HydroSHEDS

Elevation

1,637 ft

Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).

Recreation & Access

Boat Landings

Yes

Public Access

Black Oak 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 Black Oak Lake

Compare lakeside cabins, hotels, and vacation rentals near Black Oak Lake in Langlade 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 Black Oak Lake

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Follow Black Oak Lake’s readings

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Fish Species

Panfish Largemouth Bass Northern Pike

Click a species to see every lake where it is documented.

Fishing Black Oak Lake

Water Quality Trend: Improving

Based on 6 years of monitoring (2020–2025).

Water clarity
Improving
6 years

See year-by-year chart →

Nearby Lakes in Langlade County

Long Lake—View →Lower Clear Lake12 ft clear—View →Lower Bass Lake—View →Indian Lake6 ft clear—View →Unnamed Lake—View →Sucker Lake—View →

Frequently asked questions about Black Oak Lake

Where is Black Oak Lake?: Black Oak Lake is a lake in Langlade County, Wisconsin. Its water-quality measurements are published by Wisconsin DNR and shown on this page as reported.
What is the water quality of Black Oak Lake?: Black Oak Lake in Langlade County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 4.3 ft visibility. Phosphorus: 29.1 µg/L. Maximum depth: 34 ft. Surface area: 56 acres.
Is Black Oak Lake safe to swim in?: Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Black Oak Lake?: Black Oak Lake has a maximum depth of 34 feet. The lake covers 56 acres.
What fish are in Black Oak Lake?: Fish species found in Black Oak Lake include Panfish, Largemouth Bass, Northern Pike. Black Oak Lake is located in Langlade County, Wisconsin.
What did the DNR fisheries survey find at Black Oak Lake?: Wisconsin DNR lists Panfish as present on Black Oak Lake. A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Black Oak 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 Black Oak Lake?: Black Oak Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Black Oak Lake. Public access is listed as yes.
Can I fish at Black Oak Lake?: Black Oak 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.

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Where this data comes from

14 measurements from 1 monitoring station, 2021–2022. Retrieved from the EPA Water Quality Portal on 2026-08-02.

Collected and reported by

Wisconsin Department of Natural ResourcesWIDNR_WQX14 samples · 2021–2022

Analytical methods

Phosphorus by Colorimetry

Monitoring station identifiers (1)

WIDNR_WQX-343036

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.