Hells Canyon Reservoir
Hells Canyon Reservoir in Wallowa County, Oregon is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 2301 acres.
- Area
- 2,301 acres
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Why Hells Canyon Reservoir 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 Hells Canyon Reservoir, 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 Oregon DEQ and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Hells Canyon Reservoir is a 2,301-acre lake in Wallowa County, Oregon.
Source: EPA Water Quality Portal sampling records, Oregon DEQ, 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 Hells Canyon Reservoir
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 Hells Canyon Reservoir
Compare lakeside cabins, hotels, and vacation rentals near Hells Canyon Reservoir in Wallowa 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 Hells Canyon Reservoir
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 2,301 acres |
No bathymetric survey has been published for Hells Canyon Reservoir, so its depth is not documented here.
Fishing Hells Canyon Reservoir
Nearby Lakes in Wallowa County
Frequently asked questions about Hells Canyon Reservoir
Where is Hells Canyon Reservoir?
- Hells Canyon Reservoir is a lake in Wallowa County, Oregon. LakeQuality has not rated this lake (UNRATED) — no water-quality sampling on record for this lake.
What is the water quality grade for Hells Canyon Reservoir?
- Hells Canyon Reservoir in Wallowa County, Oregon is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 2301 acres.
Is Hells Canyon Reservoir safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Hells Canyon Reservoir is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
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Where this data comes from
Measurements for Hells Canyon Reservoir come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.