Flagstaff Lake
Lake County, Oregon3,633 acresView mapDirections
No nutrient or algae sampling on record from Oregon DEQ for this lake.
Flagstaff Lake in Lake County, Oregon has water-quality measurements published by Oregon DEQ, shown here as reported. Surface area: 3633 acres.
Flagstaff Lake is a 3,633-acre lake in Lake County, Oregon.
Source: EPA Water Quality Portal sampling records, Oregon DEQ. Methodology: how these readings are compared.
What Flagstaff Lake is good for
From access and monitoring records, not editorial picks.
- Big water3,633 acres
Swimming conditions
No readingNot rated
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Flagstaff Lake is safe to swim in today is a call for the Oregon Department of Environmental Quality and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Flagstaff Lake
These are the measurements Oregon DEQ publishes for Flagstaff 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 Flagstaff Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
3,633 acres
Shoreline
13.3 mi
No bathymetric survey has been published for Flagstaff Lake, so its depth is not documented here.
Stays via Stay22
Stays near Flagstaff Lake
Compare lakeside cabins, hotels, and vacation rentals near Flagstaff Lake in Lake County, Oregon — 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 Flagstaff Lake
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Fishing Flagstaff Lake
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Frequently asked questions about Flagstaff Lake
Where is Flagstaff Lake?
- Flagstaff Lake is a lake in Lake County, Oregon. Its water-quality measurements are published by Oregon DEQ and shown on this page as reported.
What is the water quality of Flagstaff Lake?
- Flagstaff Lake in Lake County, Oregon has water-quality measurements published by Oregon DEQ, shown here as reported. Surface area: 3633 acres.
Is Flagstaff 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 Flagstaff Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.