Lost Lake
Marshall County, South Dakota123 acresView mapDirections
No nutrient or algae sampling on record from SD DANR for this lake.
- Limited data
Lost Lake in Marshall County, South Dakota has water-quality measurements published by SD DANR, shown here as reported. Surface area: 123 acres.
Lost Lake is a 123-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 readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Lost 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.
Water quality measurements for Lost Lake
These are the measurements SD DANR publishes for Lost 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 Lost Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
123 acres
Shoreline
2.7 mi
No bathymetric survey has been published for Lost Lake, so its depth is not documented here.
Stays via Stay22
Stays near Lost Lake
Compare lakeside cabins, hotels, and vacation rentals near Lost 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.
Top-rated places to stay near Lost Lake
Prices for Oct 16–18, 4 adults. Change dates on the map below.
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a whole trip? See where to stay at South Dakota’s top lakes →
Follow Lost Lake’s readings
Email me when new measurements post for this lake. Updates stay free.
Or email
Fishing Lost Lake
Nearby Lakes in Marshall County
Frequently asked questions about Lost Lake
Where is Lost Lake?
- Lost 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 Lost Lake?
- Lost Lake in Marshall County, South Dakota has water-quality measurements published by SD DANR, shown here as reported. Surface area: 123 acres.
Is Lost Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Explore Lost Lake across LakeQuality
More lakes in South Dakota
Other Lakes in South Dakota
Where this data comes from
Measurements for Lost Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.