Grays Bay 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 Grays Bay?

Grays Bay has a maximum depth of 29.2 feet. The lake covers 179 acres.

Are there boat ramps on Grays Bay?

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

Can I fish at Grays Bay?

Grays Bay 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.

Grays Bay

Hennepin County, Minnesota179 acresView map Directions

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

Max depth

29.2 ft

Bathymetric survey

Area

179 acres

Surface area

Shoreline

2.5 mi

Measured length

Impaired · Mercury
29 ft max depth
Public access

See the measurements Directions Where to stay

Grays Bay in Hennepin County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Maximum depth: 29.2 ft. Surface area: 179 acres.

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Grays Bay is a 179-acre lake in Hennepin County, Minnesota with a maximum depth of 29 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 Grays Bay is good for

From access and monitoring records, not editorial picks.

Boat launch1 documented ramp

Swimming conditions

No reading

Not rated

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

Whether Grays Bay 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 Grays Bay

These are the measurements Minnesota PCA publishes for Grays Bay, 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 Grays Bay

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

Lake Details

Max depth

29.2 ft

Surface area

179 acres

Shoreline

2.5 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

Lake Minnetonka, Grays BayPublic

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 Grays Bay

Compare lakeside cabins, hotels, and vacation rentals near Grays Bay 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.

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Fishing Grays Bay

→ Grays Bay fishing regulations (limits, seasons, special rules)

EPA Impairment Status

Grays Bay 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 MN27-0133-01 · Official waterbody report

Nearby Lakes in Hennepin County

Shaver Lake4 ft clear0.8 miView →Gleason Lake1.7 ft clear1.7 miView →Hadley Lake8 ft clear2.4 miView →Parkers Lake7 ft clear · Eutrophic2.9 miView →Snyder Lake3.3 miView →Mooney Lake3.5 miView →

Frequently asked questions about Grays Bay

Where is Grays Bay?: Grays Bay 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 Grays Bay?: Grays Bay in Hennepin County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Maximum depth: 29.2 ft. Surface area: 179 acres.
Is Grays Bay safe to swim in?: Nutrient and algae readings are not a swimming clearance. Grays Bay is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury. Check local advisories before you swim.
How deep is Grays Bay?: Grays Bay has a maximum depth of 29.2 feet. The lake covers 179 acres.
Are there boat ramps on Grays Bay?: Grays Bay has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Lake Minnetonka, Grays Bay. Public access is listed as yes.
Can I fish at Grays Bay?: Grays Bay 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.