Where is Little Moreau Lake?

Little Moreau Lake is a lake in Dewey County, South Dakota. Its water-quality measurements are published by SD DANR and shown on this page as reported.

Are there boat ramps on Little Moreau Lake?

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

Can I fish at Little Moreau Lake?

Little Moreau 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 South Dakota's fish and wildlife agency, so check its current regulations before you go.

Little Moreau Lake

Dewey County, South Dakota34 acresView map Directions

No nutrient or algae sampling on record from SD DANR for this lake.

Area

34 acres

Surface area

Shoreline

1.2 mi

Measured length

Impaired · Mercury
Public access
Limited data

See the measurements Directions Where to stay

Little Moreau Lake in Dewey County, South Dakota has water-quality measurements published by SD DANR, shown here as reported. Surface area: 34 acres.

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Little Moreau Lake is a 34-acre lake in Dewey County, South Dakota. Limited fish-species data available. Public access is available with 1 public boat landing.

Source: EPA Water Quality Portal sampling records, SD DANR. Methodology: how these readings are compared.

What Little Moreau Lake is good for

From access and monitoring records, not editorial picks.

Boat launch1 documented ramp

Swimming conditions

No reading

Limited data

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

Whether Little Moreau Lake is safe to swim in today is a call for the South Dakota Department of Agriculture and Natural Resources and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.

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Water quality measurements for Little Moreau Lake

These are the measurements SD DANR publishes for Little Moreau 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.

Ask about Little Moreau Lake

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

Lake Details

Surface area

34 acres

Shoreline

1.2 mi

Public access

Yes

Listed by SD DANR

No bathymetric survey has been published for Little Moreau Lake, so its depth is not documented here.

Recreation & Access

Boat Landings

Yes

Public Access

Little Moreau Recreation AreaPublic

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 Little Moreau Lake

Compare lakeside cabins, hotels, and vacation rentals near Little Moreau Lake in Dewey County, South Dakota — 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 Little Moreau Lake

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Fishing Little Moreau Lake

→ Little Moreau Lake fishing regulations (limits, seasons, special rules)

EPA Impairment Status

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

Causes of impairment

MercurypH / acidity

Designated uses not supporting: Aquatic life.

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

Source: EPA ATTAINS assessment unit SD-MU-L-LITTLE_MOREAU_NO1_01 · Official waterbody report

Nearby Lakes in Dewey County

Timber Lake6 miView →Timber Lake6.4 miView →Horseshoe Lake5.5 miView →Whitehorse Lake6.4 miView →Livermant Lake6.7 miView →Peach Lake11.1 miView →

Frequently asked questions about Little Moreau Lake

Where is Little Moreau Lake?: Little Moreau Lake is a lake in Dewey County, South Dakota. Its water-quality measurements are published by SD DANR and shown on this page as reported.
What is the water quality of Little Moreau Lake?: Little Moreau Lake in Dewey County, South Dakota has water-quality measurements published by SD DANR, shown here as reported. Surface area: 34 acres.
Is Little Moreau Lake safe to swim in?: Nutrient and algae readings are not a swimming clearance. Little Moreau Lake is listed impaired under Clean Water Act §303(d) (IR 5) for mercury, pH / acidity. Check local advisories before you swim.
Are there boat ramps on Little Moreau Lake?: Little Moreau Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Little Moreau Recreation Area. Public access is listed as yes.
Can I fish at Little Moreau Lake?: Little Moreau 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 South Dakota's fish and wildlife agency, so check its current regulations before you go.