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

How deep is Boy Lake?

Boy Lake has a maximum depth of 45 feet. The lake covers 3391 acres.

Are there boat ramps on Boy Lake?

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

Can I fish at Boy Lake?

Boy 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 Minnesota's fish and wildlife agency, so check its current regulations before you go.

Boy Lake

Cass County, Minnesota3,391 acresView map Directions

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

Max depth

45 ft

Bathymetric survey

Area

3,391 acres

Surface area

Shoreline

25.8 mi

Measured length

Impaired · Mercury
45 ft max depth
Public access

See the measurements Directions Where to stay

Boy Lake in Cass County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Maximum depth: 45 ft. Surface area: 3391 acres.

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Boy Lake is a 3,391-acre lake in Cass County, Minnesota with a maximum depth of 45 feet. Limited fish-species data available. Public access is available with 1 public boat landing.

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

What Boy Lake is good for

From access and monitoring records, not editorial picks.

Boat launch1 documented ramp
Deep water45 ft surveyed max depth
Big water3,391 acres

Swimming conditions

No reading

Not rated

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

Whether Boy 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 Boy Lake

These are the measurements Minnesota PCA publishes for Boy 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 Boy Lake

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

Lake Details

Max depth

45 ft

Surface area

3,391 acres

Shoreline

25.8 mi

Public access

Yes

Listed by Minnesota PCA

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

Recreation & Access

Boat Landings

Yes

Public Access

Boy 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 Boy Lake

Compare lakeside cabins, hotels, and vacation rentals near Boy Lake in Cass 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 Boy Lake

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Fishing Boy Lake

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

EPA Impairment Status

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

Causes of impairment

Mercury

Designated uses not supporting: Fish consumption.

Source: EPA ATTAINS assessment unit MN11-0143-00 · Official waterbody report

Nearby Lakes in Cass County

Boy Lake10.5 ft clear · Mesotrophic1.4 miView →Rabbit Lake2 miView →Lake Lomish2.7 miView →Portage Lake7 ft clear · Mesotrophic2.8 miView →Middle Sucker Lake4.8 ft clear · Eutrophic2.8 miView →Town Line Lake6.6 ft clear · Mesotrophic3.2 miView →

Frequently asked questions about Boy Lake

Where is Boy Lake?: Boy Lake is a lake in Cass County, Minnesota. Its water-quality measurements are published by Minnesota PCA and shown on this page as reported.
What is the water quality of Boy Lake?: Boy Lake in Cass County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Maximum depth: 45 ft. Surface area: 3391 acres.
Is Boy Lake safe to swim in?: Nutrient and algae readings are not a swimming clearance. Boy Lake is listed impaired under Clean Water Act §303(d) (IR 5) for mercury. Check local advisories before you swim.
How deep is Boy Lake?: Boy Lake has a maximum depth of 45 feet. The lake covers 3391 acres.
Are there boat ramps on Boy Lake?: Boy Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Boy Lake. Public access is listed as yes.
Can I fish at Boy Lake?: Boy 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 Minnesota's fish and wildlife agency, so check its current regulations before you go.