Marshall Lake
Boulder County, Colorado220 acresView mapDirections
No nutrient or algae sampling on record from Colorado WQCD for this lake.
Marshall Lake in Boulder County, Colorado has water-quality measurements published by Colorado WQCD, shown here as reported. Surface area: 220 acres.
Marshall Lake is a 220-acre lake in Boulder County, Colorado.
Source: EPA Water Quality Portal sampling records, CDPHE. Methodology: how these readings are compared.
Swimming conditions
No readingNot rated
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Marshall Lake is safe to swim in today is a call for the Water Quality Control Division of the Colorado Department of Public Health and Environment and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Marshall Lake
These are the measurements Colorado WQCD publishes for Marshall 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 Marshall Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
220 acres
Shoreline
3 mi
No bathymetric survey has been published for Marshall Lake, so its depth is not documented here.
Stays via Stay22
Stays near Marshall Lake
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Frequently asked questions about Marshall Lake
Where is Marshall Lake?
- Marshall Lake is a lake in Boulder County, Colorado. Its water-quality measurements are published by Colorado WQCD and shown on this page as reported.
What is the water quality of Marshall Lake?
- Marshall Lake in Boulder County, Colorado has water-quality measurements published by Colorado WQCD, shown here as reported. Surface area: 220 acres.
Is Marshall Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
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Where this data comes from
Measurements for Marshall Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.