Osoyoos Lake
Osoyoos Lake in Okanogan County, Washington is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 2059 acres.
- Area
- 2,059 acres
- Public access
- Yes
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Why Osoyoos Lake has no grade
We grade a lake only when the monitoring record supports a letter: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For Osoyoos Lake, no water-quality sampling on record for this lake.
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. Everything below that has been measured is still reported on this page.
Sampling is run by WA Ecology and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
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, last sampled recent years. Grade methodology: LakeQuality methodology.
Watch Osoyoos Lake water quality
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Swimming Safety
Not ratedElevated nutrients
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Osoyoos Lake
These readings exist but are not enough for an A–F grade — see why.
No clarity data. Trophic State Index: undefined.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) |
Where to stay 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
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 2,059 acres |
| Public Access | Yes |
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
Fishing Osoyoos Lake
Nearby Lakes in Okanogan County
Frequently asked questions about Osoyoos Lake
Where is Osoyoos Lake?
- Osoyoos Lake is a lake in Okanogan County, Washington. LakeQuality has not rated this lake (UNRATED) — no water-quality sampling on record for this lake.
What is the water quality grade for Osoyoos Lake?
- Osoyoos Lake in Okanogan County, Washington is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 2059 acres.
Is Osoyoos Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Osoyoos Lake is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
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.
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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
Named boat-access points from the USGS National Boat Ramps inventory