Boulder Lake
Skagit County, Washington56 acresView mapDirections
No nutrient or algae sampling on record from Washington Ecology for this lake.
Boulder Lake in Skagit County, Washington has water-quality measurements published by Washington Ecology, shown here as reported. Surface area: 56 acres.
Boulder Lake is a 56-acre lake in Skagit County, Washington.
Source: EPA Water Quality Portal sampling records, WA Ecology. 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 Boulder Lake is safe to swim in today is a call for the Washington State Department of Ecology and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Boulder Lake
These are the measurements Washington Ecology publishes for Boulder 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 Boulder Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
56 acres
Shoreline
1.2 mi
No bathymetric survey has been published for Boulder Lake, so its depth is not documented here.
Stays via Stay22
Stays near Boulder Lake
Compare lakeside cabins, hotels, and vacation rentals near Boulder Lake in Skagit County, Washington — 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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Frequently asked questions about Boulder Lake
Where is Boulder Lake?
- Boulder Lake is a lake in Skagit County, Washington. Its water-quality measurements are published by Washington Ecology and shown on this page as reported.
What is the water quality of Boulder Lake?
- Boulder Lake in Skagit County, Washington has water-quality measurements published by Washington Ecology, shown here as reported. Surface area: 56 acres.
Is Boulder 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 Boulder Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.