Where is Gillis Lake?

Gillis Lake is a lake in Cook County, Minnesota. Its water-quality measurements are published by Minnesota PCA and shown on this page as reported.

How deep is Gillis Lake?

Gillis Lake has a maximum depth of 180.1 feet. The lake covers 615 acres.

Gillis Lake

Cook County, Minnesota615 acresView map Directions

No nutrient or algae sampling on record from Minnesota PCA for this lake.

Max depth

180.1 ft

Bathymetric survey

Area

615 acres

Surface area

Shoreline

8.3 mi

Measured length

Impaired · Mercury
180 ft max depth

See the measurements Directions Where to stay

Gillis Lake in Cook County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Maximum depth: 180.1 ft. Surface area: 615 acres.

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Gillis Lake is a 615-acre lake in Cook County, Minnesota with a maximum depth of 180 feet.

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

What Gillis Lake is good for

From access and monitoring records, not editorial picks.

Deep water180.1 ft surveyed max depth

Swimming conditions

No reading

Not rated

Nutrient and algae readings are not a swimming clearance. Gillis Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury. Check local advisories before you swim.

Whether Gillis Lake is safe to swim in today is a call for the Minnesota Pollution Control Agency and the Minnesota DNR and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.

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Water quality measurements for Gillis Lake

These are the measurements Minnesota PCA publishes for Gillis 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 Gillis Lake

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

Lake Details

Max depth

180.1 ft

Surface area

615 acres

Shoreline

8.3 mi

Stays via Stay22

Stays near Gillis Lake

Compare lakeside cabins, hotels, and vacation rentals near Gillis Lake in Cook County, Minnesota — 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 Gillis Lake

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Fishing Gillis Lake

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

EPA Impairment Status

Gillis Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).

Causes of impairment

Mercury

Designated uses not supporting: Fish consumption.

A Total Maximum Daily Load (TMDL) plan has been approved.

Source: EPA ATTAINS assessment unit MN16-0753-00 · Official waterbody report

Nearby Lakes in Cook County

Crooked Lake5.5 ft clear1.1 miView →Bat Lake1 miView →French Lake1 miView →Owl Lake13 ft clear1.3 miView →Crag Lake1.3 miView →Tarry Lake13 ft clear—View →

Frequently asked questions about Gillis Lake

Where is Gillis Lake?: Gillis Lake is a lake in Cook County, Minnesota. Its water-quality measurements are published by Minnesota PCA and shown on this page as reported.
What is the water quality of Gillis Lake?: Gillis Lake in Cook County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Maximum depth: 180.1 ft. Surface area: 615 acres.
Is Gillis Lake safe to swim in?: Nutrient and algae readings are not a swimming clearance. Gillis Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury. Check local advisories before you swim.
How deep is Gillis Lake?: Gillis Lake has a maximum depth of 180.1 feet. The lake covers 615 acres.