Riley Lake
Riley Lake in Snohomish County, Washington is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 30 acres.
- Area
- 30 acres
- Public access
- Yes
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Why Riley 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 Riley 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.
Riley Lake is a 30-acre lake in Snohomish County, Washington. Limited fish-species data available. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, WA Ecology, last sampled recent years. Grade methodology: LakeQuality methodology.
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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 Riley 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 Riley Lake
Compare lakeside cabins, hotels, and vacation rentals near Riley Lake in Snohomish 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 Riley Lake
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 30 acres |
| Public Access | Yes |
No bathymetric survey has been published for Riley Lake, so its depth is not documented here.
Recreation & Access
- Riley LakePublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Riley Lake
Nearby Lakes in Snohomish County
Frequently asked questions about Riley Lake
Where is Riley Lake?
- Riley Lake is a lake in Snohomish 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 Riley Lake?
- Riley Lake in Snohomish County, Washington is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 30 acres.
Is Riley Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Riley 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 Riley Lake?
- Riley Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Riley Lake. Public access is listed as yes.
Explore Riley Lake across LakeQuality
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Where this data comes from
Measurements for Riley 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