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

How deep is Grand Lake?

Grand Lake has a maximum depth of 23.9 feet. The lake covers 1668 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 Minnesota's fish and wildlife agency, so check its current regulations before you go.

Grand Lake

St. Louis County, Minnesota1,668 acresView map Directions

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

Max depth

23.9 ft

Bathymetric survey

Area

1,668 acres

Surface area

Shoreline

8 mi

Measured length

Impaired · Mercury
24 ft max depth
Public access

See the measurements Directions Where to stay

Grand Lake in St. Louis County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Maximum depth: 23.9 ft. Surface area: 1668 acres.

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Grand Lake is a 1,668-acre lake in St. Louis County, Minnesota with a maximum depth of 24 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 Grand Lake is good for

From access and monitoring records, not editorial picks.

Boat launch1 documented ramp
Big water1,668 acres

Swimming conditions

No reading

Not rated

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

Whether Grand 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 Grand Lake

These are the measurements Minnesota PCA 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

23.9 ft

Surface area

1,668 acres

Shoreline

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

Grand 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 Grand Lake

Compare lakeside cabins, hotels, and vacation rentals near Grand Lake in St. Louis 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 Grand Lake

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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

Mercury

Designated uses not supporting: Fish consumption.

Source: EPA ATTAINS assessment unit MN69-0511-00 · Official waterbody report

Nearby Lakes in St. Louis County

Little Grand Lake1.5 miView →Baby Grand Lake1.6 miView →Beaver Lake2.6 miView →Mud Lake2.8 miView →Long Lake3.1 miView →Twin Lake3.6 ft clear—View →

Frequently asked questions about Grand Lake

Where is Grand Lake?: Grand Lake is a lake in St. Louis County, Minnesota. Its water-quality measurements are published by Minnesota PCA and shown on this page as reported.
What is the water quality of Grand Lake?: Grand Lake in St. Louis County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Maximum depth: 23.9 ft. Surface area: 1668 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 mercury. Check local advisories before you swim.
How deep is Grand Lake?: Grand Lake has a maximum depth of 23.9 feet. The lake covers 1668 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 Minnesota's fish and wildlife agency, so check its current regulations before you go.