Where is Lake of the Isles?

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

How deep is Lake of the Isles?

Lake of the Isles has a maximum depth of 31 feet. The lake covers 120 acres.

Lake of the Isles

Hennepin County, Minnesota120 acresView map Directions

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

Max depth

31 ft

Bathymetric survey

Area

120 acres

Surface area

Shoreline

3.5 mi

Measured length

Impaired · Mercury
31 ft max depth

See the measurements Directions Where to stay

Lake of the Isles in Hennepin County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Maximum depth: 31 ft. Surface area: 120 acres.

Loading map…

Lake of the Isles is a 120-acre lake in Hennepin County, Minnesota with a maximum depth of 31 feet.

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

What Lake of the Isles is good for

From access and monitoring records, not editorial picks.

Deep water31 ft surveyed max depth

Swimming conditions

No reading

Not rated

Nutrient and algae readings are not a swimming clearance. Lake of the Isles is listed impaired under Clean Water Act §303(d) (IR 5) for mercury, pFAS. Check local advisories before you swim.

Whether Lake of the Isles 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.

Compare swimming lakes near Minneapolis →

Get alerts for Lake of the Isles →

Water quality measurements for Lake of the Isles

These are the measurements Minnesota PCA publishes for Lake of the Isles, 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 Lake of the Isles

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

Lake Details

Max depth

31 ft

Surface area

120 acres

Shoreline

3.5 mi

The depth above comes from a bathymetric survey of this lake, not from a regional estimate.

Stays via Stay22

Stays near Lake of the Isles

Compare lakeside cabins, hotels, and vacation rentals near Lake of the Isles in Hennepin 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 Lake of the Isles

Prices for Oct 16–18, 4 adults. Change dates on the map below.

Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.

Planning a whole trip? See where to stay at Minnesota’s top lakes →

Follow Lake of the Isles’s readings

Email me when new measurements post for this lake. Updates stay free.

Or email

Fishing Lake of the Isles

→ Lake of the Isles fishing regulations (limits, seasons, special rules)

EPA Impairment Status

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

Causes of impairment

MercuryPFAS

Designated uses not supporting: Fish consumption.

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

Source: EPA ATTAINS assessment unit MN27-0040-00 · Official waterbody report

Nearby Lakes in Hennepin County

Lake of the Isles5.2 ft clear · Eutrophic0.2 miView →Cedar Lake4.8 ft clear · Eutrophic0.6 miView →Bde Maka Ska Lake9.8 ft clear · Eutrophic0.9 miView →Brownie Lake5 ft clear · Eutrophic1.1 miView →Spring Lake3.4 ft clear · Hypereutrophic1.2 miView →Loring Lake2.9 ft clear · Eutrophic1.5 miView →

Frequently asked questions about Lake of the Isles

Where is Lake of the Isles?: Lake of the Isles is a lake in Hennepin County, Minnesota. Its water-quality measurements are published by Minnesota PCA and shown on this page as reported.
What is the water quality of Lake of the Isles?: Lake of the Isles in Hennepin County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Maximum depth: 31 ft. Surface area: 120 acres.
Is Lake of the Isles safe to swim in?: Nutrient and algae readings are not a swimming clearance. Lake of the Isles is listed impaired under Clean Water Act §303(d) (IR 5) for mercury, pFAS. Check local advisories before you swim.
How deep is Lake of the Isles?: Lake of the Isles has a maximum depth of 31 feet. The lake covers 120 acres.