Olallie Lake
Olallie Lake in Jefferson County, Oregon is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 195 acres.
- Area
- 195 acres
- Public access
- Yes
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Why Olallie 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 Olallie 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 Oregon DEQ and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Olallie Lake is a 195-acre lake in Jefferson County, Oregon. Limited fish-species data available. Public access is available with 2 public boat landings.
Source: EPA Water Quality Portal sampling records, Oregon DEQ, last sampled recent years. Grade methodology: LakeQuality methodology.
Watch Olallie 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 Olallie 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 Olallie Lake
Compare lakeside cabins, hotels, and vacation rentals near Olallie Lake in Jefferson 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 Olallie Lake
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 195 acres |
| Public Access | Yes |
No bathymetric survey has been published for Olallie Lake, so its depth is not documented here.
Recreation & Access
- Peninsula CampgroundPublic
- Ollalie Lake ResortSemi-private
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Olallie Lake
Nearby Lakes in Jefferson County
Frequently asked questions about Olallie Lake
Where is Olallie Lake?
- Olallie Lake is a lake in Jefferson 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 Olallie Lake?
- Olallie Lake in Jefferson County, Oregon is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 195 acres.
Is Olallie Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Olallie 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 Olallie Lake?
- Olallie Lake has 2 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Peninsula Campground, Ollalie Lake Resort. Public access is listed as yes.
Explore Olallie Lake across LakeQuality
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Where this data comes from
Measurements for Olallie 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