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

How deep is Grand Lake?

Grand Lake has a maximum depth of 8 feet. The lake covers 242 acres.

Are there boat ramps on Grand Lake?

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

Can I fish at Grand Lake?

Grand 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.

Grand Lake

Green Lake County, Wisconsin242 acresView map Directions

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

Max depth

8 ft

Bathymetric survey

Area

242 acres

Surface area

Shoreline

5.2 mi

Measured length

Impaired · Nutrients (phosphorus, nitrogen)
8 ft max depth
Public access

See the measurements Directions Where to stay

Grand Lake in Green Lake County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Maximum depth: 8 ft. Surface area: 242 acres.

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Grand Lake is a 242-acre lake in Green Lake County, Wisconsin with a maximum depth of 8 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 Grand Lake is good for

From access and monitoring records, not editorial picks.

Boat launch1 documented ramp

Swimming conditions

No reading

Recreation use not supported

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

Whether Grand 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 Grand Lake

These are the measurements Wisconsin DNR publishes for Grand 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 Grand Lake

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

Lake Details

Max depth

8 ft

Surface area

242 acres

Shoreline

5.2 mi

Public access

Yes

Listed by Wisconsin DNR

Recreation & Access

Boat Landings

Yes

Public Access

Grand 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 Grand Lake

Compare lakeside cabins, hotels, and vacation rentals near Grand Lake in Green Lake 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 Grand Lake

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Follow Grand Lake’s readings

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Fishing Grand Lake

→ Grand Lake fishing regulations (limits, seasons, special rules)

EPA Impairment Status

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

Causes of impairment

Nutrients (phosphorus, nitrogen)

Designated uses not supporting: Aquatic life, Recreation.

Source: EPA ATTAINS assessment unit WI10000737 · Official waterbody report

Nearby Lakes in Green Lake County

Spring Lake2.2 miView →Lake Puckaway4.4 ft clear · Eutrophic5.4 miView →County K Marsh LakeHypereutrophic6.7 miView →Lake Maria6.6 miView →Little Green Lake3.2 ft clear · Eutrophic7.4 miView →Spring Lake8.9 miView →

Frequently asked questions about Grand Lake

Where is Grand Lake?: Grand Lake is a lake in Green Lake County, Wisconsin. Its water-quality measurements are published by Wisconsin DNR and shown on this page as reported.
What is the water quality of Grand Lake?: Grand Lake in Green Lake County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Maximum depth: 8 ft. Surface area: 242 acres.
Is Grand Lake safe to swim in?: Nutrient and algae readings are not a swimming clearance. Grand Lake is listed impaired under Clean Water Act §303(d) (IR 5) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
How deep is Grand Lake?: Grand Lake has a maximum depth of 8 feet. The lake covers 242 acres.
Are there boat ramps on Grand Lake?: Grand Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Grand Lake. Public access is listed as yes.
Can I fish at Grand Lake?: Grand 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.