Where is Big Fork Lake?

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

How deep is Big Fork Lake?

Big Fork Lake has a maximum depth of 37 feet. The lake covers 663 acres.

Are there boat ramps on Big Fork Lake?

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

Can I fish at Big Fork Lake?

Big Fork 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.

Big Fork Lake

Oneida County, Wisconsin663 acresView map Directions

No nutrient or algae sampling on record from Wisconsin DNR for this lake.

Max depth

37 ft

Bathymetric survey

Area

663 acres

Surface area

Impaired · Mercury
37 ft max depth
Public access

See the measurements Directions Where to stay

Big Fork Lake in Oneida County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Maximum depth: 37 ft. Surface area: 663 acres.

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Big Fork Lake is a 663-acre lake in Oneida County, Wisconsin with a maximum depth of 37 feet. Limited fish-species data available. Public access is available with 1 public boat landing.

Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water. Methodology: how these readings are compared.

What Big Fork Lake is good for

From access and monitoring records, not editorial picks.

Boat launch1 documented ramp
Deep water37 ft surveyed max depth

Swimming conditions

No reading

Recreation use not supported

Nutrient and algae readings are not a swimming clearance. Big Fork Lake is listed impaired under Clean Water Act §303(d) (IR 5) for mercury, nutrients (phosphorus, nitrogen). Check local advisories before you swim.

Whether Big Fork 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 Big Fork Lake

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

No clarity data. TSI undefined.

Ask about Big Fork Lake

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

Lake Details

Max depth

37 ft

Surface area

663 acres

Public access

Yes

Listed by Wisconsin DNR

Recreation & Access

Boat Landings

Yes

Public Access

Big Fork LakePublic

Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps

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Stays near Big Fork Lake

Compare lakeside cabins, hotels, and vacation rentals near Big Fork Lake in Oneida 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 Big Fork Lake

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Fishing Big Fork Lake

→ Big Fork Lake fishing regulations (limits, seasons, special rules)

EPA Impairment Status

Big Fork Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).

Causes of impairment

MercuryNutrients (phosphorus, nitrogen)

Designated uses not supporting: Aquatic life, Fish consumption, Recreation.

Source: EPA ATTAINS assessment unit WI10007221 · Official waterbody report

Nearby Lakes in Oneida County

Little Fork Lake6 ft clear · Mesotrophic0.8 miView →Spring Lake1.2 miView →Fourmile Lake3 ft clear · Eutrophic1.6 miView →Laurel Lake3.7 ft clear · Eutrophic1.7 miView →Big Stone Lake4.2 ft clear · Eutrophic1.9 miView →Island Lake7 ft clear · Mesotrophic1.7 miView →

Frequently asked questions about Big Fork Lake

Where is Big Fork Lake?: Big Fork Lake is a lake in Oneida County, Wisconsin. Its water-quality measurements are published by Wisconsin DNR and shown on this page as reported.
What is the water quality of Big Fork Lake?: Big Fork Lake in Oneida County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Maximum depth: 37 ft. Surface area: 663 acres.
Is Big Fork Lake safe to swim in?: Nutrient and algae readings are not a swimming clearance. Big Fork Lake is listed impaired under Clean Water Act §303(d) (IR 5) for mercury, nutrients (phosphorus, nitrogen). Check local advisories before you swim.
How deep is Big Fork Lake?: Big Fork Lake has a maximum depth of 37 feet. The lake covers 663 acres.
Are there boat ramps on Big Fork Lake?: Big Fork Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Big Fork Lake. Public access is listed as yes.
Can I fish at Big Fork Lake?: Big Fork 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.