Osoyoos Lake
Okanogan County, Washington2,059 acresView mapDirections
No nutrient or algae sampling on record from Washington Ecology for this lake.
- Impaired · Pesticides
- Public access
Osoyoos Lake in Okanogan County, Washington has water-quality measurements published by Washington Ecology, shown here as reported. Surface area: 2059 acres.
Osoyoos Lake is a 2,059-acre lake in Okanogan County, Washington. Limited fish-species data available. Public access is available with 2 public boat landings.
Source: EPA Water Quality Portal sampling records, WA Ecology. Methodology: how these readings are compared.
What Osoyoos Lake is good for
From access and monitoring records, not editorial picks.
- Boat launch2 documented ramps
- Camping1 public campground nearby
- Big water2,059 acres
Swimming conditions
No readingNot rated
Nutrient and algae readings are not a swimming clearance. Osoyoos Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for pesticides. Check local advisories before you swim.
Whether Osoyoos 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 Osoyoos Lake
These are the measurements Washington Ecology publishes for Osoyoos 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 Osoyoos Lake
Answers come straight from the public measurements and survey records on this page.
→ Osoyoos Lake water level: the live USGS gauge reading
Lake Details
Surface area
2,059 acres
Shoreline
11.5 mi
Public access
Yes
Listed by Washington Ecology
No bathymetric survey has been published for Osoyoos Lake, so its depth is not documented here.
Recreation & Access
- Deep Bay ParkPublic
- Veranda Beach ResortSemi-private
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Public campgrounds near Osoyoos Lake
- Osoyoos Lake Veteran’s Memorial Park2.9 km
Nearest public campgrounds in the USGS National Map inventory, within about 3 miles. An empty list means USGS records no campground that close, which is not the same as camping being unavailable. Where the source gives an official reservation link, it is used; the cabin and hotel search does not cover campsites. More camping lakes
Stays via Stay22
Stays near Osoyoos Lake
Compare lakeside cabins, hotels, and vacation rentals near Osoyoos Lake in Okanogan 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.
Top-rated places to stay near Osoyoos Lake
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 trip? Cabins and lodging at Osoyoos Lake → · more Washington lake trips
Follow Osoyoos Lake’s readings
Email me when new measurements post for this lake. Updates stay free.
Or email
Fishing Osoyoos Lake
EPA Impairment Status
Osoyoos Lake is officially listed as impaired under Clean Water Act §303(d) in the 2018 EPA reporting cycle (IR category 4A).
Causes of impairment
Designated uses not supporting: Drinking water, Fish consumption.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit WA48119J4H3_01_01 · Official waterbody report
Nearby Lakes in Okanogan County
Frequently asked questions about Osoyoos Lake
Where is Osoyoos Lake?
- Osoyoos Lake is a lake in Okanogan County, Washington. Its water-quality measurements are published by Washington Ecology and shown on this page as reported.
What is the water quality of Osoyoos Lake?
- Osoyoos Lake in Okanogan County, Washington has water-quality measurements published by Washington Ecology, shown here as reported. Surface area: 2059 acres.
Is Osoyoos Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Osoyoos Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for pesticides. Check local advisories before you swim.
Are there boat ramps on Osoyoos Lake?
- Osoyoos Lake has 2 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Deep Bay Park, Veranda Beach Resort. Public access is listed as yes.
Can I fish at Osoyoos Lake?
- Osoyoos Lake has 2 documented boat landings in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by Washington's fish and wildlife agency, so check its current regulations before you go.
Are there campgrounds on Osoyoos Lake?
- Osoyoos Lake has 1 public campground from USGS The National Map within 5 km, including Osoyoos Lake Veteran’s Memorial Park. This is a location join, not a booking. Cabins and hotels are listed separately; campsite reservations use the official link when the source provides one.
Explore Osoyoos Lake across LakeQuality
More lakes in Washington
Other Lakes in Washington
Where this data comes from
Measurements for Osoyoos Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database
Named boat-access points from the USGS National Boat Ramps inventory
Public campgrounds from USGS The National Map Structures, within about 3 miles