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

Heap Lake

Lyman County, South Dakota69 acresView map Directions

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

Area

69 acres

Surface area

See the measurements Directions Where to stay

Heap Lake in Lyman County, South Dakota has water-quality measurements published by SD DANR, shown here as reported. Surface area: 69 acres.

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Heap Lake is a 69-acre lake in Lyman 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. Check local advisories before you swim.

Whether Heap 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 Heap Lake

These are the measurements SD DANR publishes for Heap 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 Heap Lake

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

Lake Details

Surface area

69 acres

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

Stays via Stay22

Stays near Heap Lake

Compare lakeside cabins, hotels, and vacation rentals near Heap Lake in Lyman 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 Heap Lake

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Fishing Heap Lake

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

Nearby Lakes in Lyman County

Reliance Lake5.8 miView →Fate Dam17.5 miView →Hamill Dam Reservoir16.8 miView →Bedashosha Lake—View →Lake Ambrose—View →Red Lake—View →

Frequently asked questions about Heap Lake

Where is Heap Lake?: Heap Lake is a lake in Lyman 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 Heap Lake?: Heap Lake in Lyman County, South Dakota has water-quality measurements published by SD DANR, shown here as reported. Surface area: 69 acres.
Is Heap Lake safe to swim in?: Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.