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

How deep is Rock Lake?

Rock Lake has a maximum depth of 10 feet. The lake covers 77 acres.

Are there boat ramps on Rock Lake?

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

Can I fish at Rock Lake?

Rock 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.

Rock Lake

Pine County, Minnesota77 acresView map Directions

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

Max depth

10 ft

Bathymetric survey

Area

77 acres

Surface area

Shoreline

1.4 mi

Measured length

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

See the measurements Directions Where to stay

Rock Lake in Pine County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Maximum depth: 10 ft. Surface area: 77 acres.

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Rock Lake is a 77-acre lake in Pine County, Minnesota with a maximum depth of 10 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 Rock 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. Rock Lake is listed impaired under Clean Water Act §303(d) (IR 4C) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.

Whether Rock 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 Rock Lake

These are the measurements Minnesota PCA publishes for Rock 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 Rock Lake

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

Lake Details

Max depth

10 ft

Surface area

77 acres

Shoreline

1.4 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

Rock 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 Rock Lake

Compare lakeside cabins, hotels, and vacation rentals near Rock Lake in Pine 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.

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Fishing Rock Lake

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

EPA Impairment Status

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

Causes of impairment

Nutrients (phosphorus, nitrogen)

Designated uses not supporting: Recreation.

Source: EPA ATTAINS assessment unit MN58-0007-00 · Official waterbody report

Nearby Lakes in Pine County

Churchill Lake1.1 miView →Graces Lake1.8 miView →Hay Creek Flowage3 miView →Greigs Lake12.6 ft clear2.3 miView →Lena Lake2.7 miView →Razor Lake3.1 miView →

Frequently asked questions about Rock Lake

Where is Rock Lake?: Rock Lake is a lake in Pine County, Minnesota. Its water-quality measurements are published by Minnesota PCA and shown on this page as reported.
What is the water quality of Rock Lake?: Rock Lake in Pine County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Maximum depth: 10 ft. Surface area: 77 acres.
Is Rock Lake safe to swim in?: Nutrient and algae readings are not a swimming clearance. Rock Lake is listed impaired under Clean Water Act §303(d) (IR 4C) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
How deep is Rock Lake?: Rock Lake has a maximum depth of 10 feet. The lake covers 77 acres.
Are there boat ramps on Rock Lake?: Rock Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Rock Lake. Public access is listed as yes.
Can I fish at Rock Lake?: Rock 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.