N St Vrain Lake
Boulder County, ColoradoView mapDirections
No nutrient or algae sampling on record from Colorado WQCD for this lake.
- Limited data
N St Vrain Lake in Boulder County, Colorado has water-quality measurements published by Colorado WQCD, shown here as reported.
N St Vrain Lake is a lake in Boulder County, Colorado.
Source: EPA Water Quality Portal sampling records, CDPHE, last sampled 2024-10-29. 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 N St Vrain 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 N St Vrain Lake
These are the measurements Colorado WQCD publishes for N St Vrain 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 N St Vrain Lake
Answers come straight from the public measurements and survey records on this page.
Stays via Stay22
Stays near N St Vrain Lake
Compare lakeside cabins, hotels, and vacation rentals near N St Vrain Lake in Boulder County, Colorado — 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 N St Vrain Lake
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Fishing N St Vrain Lake
Nearby Lakes in Boulder County
Frequently asked questions about N St Vrain Lake
Where is N St Vrain Lake?
- N St Vrain 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 N St Vrain Lake?
- N St Vrain Lake in Boulder County, Colorado has water-quality measurements published by Colorado WQCD, shown here as reported.
Is N St Vrain Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Explore N St Vrain Lake across LakeQuality
Planning a trip around Rocky Mountain?
N St Vrain Lake is about 23 miles from Rocky Mountain National Park. Crowds there swing hard by season, so the month you pick changes both how busy the park is and what lodging costs.
Best time to visit Rocky Mountain →More lakes in Colorado
Other Lakes in Colorado
Where this data comes from
4 measurements from 1 monitoring station, 2023–2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Colorado River Watch (Volunteer)
CORIVWCH_WQX4 samples · 2023–2024
Analytical methods
- Phosphorus by Colorimetry
Monitoring station identifiers (1)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.