Threemile Reservoir
Klamath County, Oregon130 acresView mapDirections
No nutrient or algae sampling on record from Oregon DEQ for this lake.
Threemile Reservoir in Klamath County, Oregon has water-quality measurements published by Oregon DEQ, shown here as reported. Surface area: 130 acres.
Threemile Reservoir is a 130-acre lake in Klamath County, Oregon.
Source: EPA Water Quality Portal sampling records, Oregon DEQ. 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 Threemile Reservoir 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 Threemile Reservoir
These are the measurements Oregon DEQ publishes for Threemile Reservoir, 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 Threemile Reservoir
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
130 acres
No bathymetric survey has been published for Threemile Reservoir, so its depth is not documented here.
Stays via Stay22
Stays near Threemile Reservoir
Compare lakeside cabins, hotels, and vacation rentals near Threemile Reservoir in Klamath 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 Threemile Reservoir
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 Oregon’s top lakes →
Follow Threemile Reservoir’s readings
Email me when new measurements post for this lake. Updates stay free.
Or email
Fishing Threemile Reservoir
Nearby Lakes in Klamath County
Frequently asked questions about Threemile Reservoir
Where is Threemile Reservoir?
- Threemile Reservoir is a lake in Klamath County, Oregon. Its water-quality measurements are published by Oregon DEQ and shown on this page as reported.
What is the water quality of Threemile Reservoir?
- Threemile Reservoir in Klamath County, Oregon has water-quality measurements published by Oregon DEQ, shown here as reported. Surface area: 130 acres.
Is Threemile Reservoir safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Explore Threemile Reservoir across LakeQuality
More lakes in Oregon
Other Lakes in Oregon
Where this data comes from
Measurements for Threemile Reservoir come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.