Where is Horseshoe Lake?

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

Horseshoe Lake

Marshall County, South Dakota125 acresView map Directions

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

Area

125 acres

Surface area

Shoreline

2.7 mi

Measured length

Impaired · Mercury

See the measurements Directions Where to stay

Horseshoe Lake in Marshall County, South Dakota has water-quality measurements published by SD DANR, shown here as reported. Surface area: 125 acres.

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Horseshoe Lake is a 125-acre lake in Marshall County, South Dakota.

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

Swimming conditions

No reading

Not rated

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

Whether Horseshoe 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 Horseshoe Lake

These are the measurements SD DANR publishes for Horseshoe 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 Horseshoe Lake

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

Lake Details

Surface area

125 acres

Shoreline

2.7 mi

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

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Stays near Horseshoe Lake

Compare lakeside cabins, hotels, and vacation rentals near Horseshoe Lake in Marshall 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.

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Fishing Horseshoe Lake

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

EPA Impairment Status

Horseshoe Lake 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: Aquatic life.

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

Source: EPA ATTAINS assessment unit SD-JA-L-HORSESHOE_01 · Official waterbody report

Nearby Lakes in Marshall County

Twomile Lake0.9 miView →Mallard Slough1.2 miView →Threemile Lake2.1 miView →Clubhouse Slough2 miView →Goose Lake2.8 miView →Parsons Pass2.9 miView →

Frequently asked questions about Horseshoe Lake

Where is Horseshoe Lake?: Horseshoe Lake is a lake in Marshall 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 Horseshoe Lake?: Horseshoe Lake in Marshall County, South Dakota has water-quality measurements published by SD DANR, shown here as reported. Surface area: 125 acres.
Is Horseshoe Lake safe to swim in?: Nutrient and algae readings are not a swimming clearance. Horseshoe Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury. Check local advisories before you swim.