Pine Hollow Reservoir
Wasco County, Oregon235 acresView mapDirections
Oregon DEQ publishes the water-quality measurements for Pine Hollow Reservoir. Here is what has been measured.
- Mesotrophic
- 21 ft max depth
- Public access
- Limited data
Pine Hollow Reservoir in Wasco County, Oregon has water-quality measurements published by Oregon DEQ, shown here as reported. Chlorophyll-a (algae): 4.5 µg/L. Surface area: 235 acres.
Pine Hollow Reservoir is a 235-acre mesotrophic lake in Wasco County, Oregon with an estimated average depth of about 21 feet. Overall water quality is declining over recent sampling years. 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 2025-09-25. Methodology: how these readings are compared.
Pine Hollow Reservoir covers about 240 acres in Wasco County. It has 2 public boat landings, so a lakefront rental is not the only way to get a boat on the water. For a place on the water, look through cabin and lake-house rentals near Pine Hollow Reservoir on Vrbo. For a hotel or motel room, Booking.com and Expedia both search around the lake.
What Pine Hollow Reservoir is good for
From access and monitoring records, not editorial picks.
- Boat launch2 documented ramps
Swimming conditions
Readings onlyLimited data
Based on clarity and algae readings from past sampling — there is no live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Pine Hollow Reservoir is safe to swim in today is a call for the Oregon Department of Environmental Quality and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Pine Hollow Reservoir
These are the measurements Oregon DEQ publishes for Pine Hollow Reservoir, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data. Chlorophyll-a 4.5 µg/L. TSI 45.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | No reading How deep a black-and-white disk stays visible from the surface. Higher is clearer. | |
| Total phosphorus | No reading The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. | |
| Chlorophyll-a (algae) | 4.5µg/L | Poor GoodFairPoor |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 45 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Pine Hollow Reservoir
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
~21 ft est.
Surface area
235 acres
Public access
Yes
Listed by Oregon DEQ
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Oregon has not published bathymetry for Pine Hollow Reservoir.
Lake Size & Watershed
Watershed (drainage) area
3 sq mi
HydroLAKES / HydroSHEDS
Shoreline
2.6 mi
HydroLAKES / HydroSHEDS
Elevation
1,837 ft
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth here is modelled, not surveyed — HydroLAKES v1.0 estimates lake depth from surrounding terrain rather than from soundings. Treat it as an approximation, and prefer a state bathymetric survey where one exists.
Recreation & Access
- Pine Hollow Reservoir South ShorePublic
- Pine Hollow Reservoir ResortSemi-private
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Stays via Stay22
Stays near Pine Hollow Reservoir
Compare lakeside cabins, hotels, and vacation rentals near Pine Hollow Reservoir in Wasco 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. The water-quality readings cover nutrients and algae, not lodging. Cabins and rentals around Pine Hollow Reservoir are listed below.
Top-rated places to stay near Pine Hollow Reservoir
Prices for Oct 30–Nov 1, 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 Pine Hollow Reservoir → · more Oregon lake trips
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Fishing Pine Hollow Reservoir
Water quality readings over time
2 seasons of samples on record (2024–2025). Calling a direction takes at least 4 years of the same measurement.
Chlorophyll-a
Worsening+1.4 µg/L/yr2 years
Reservoir Info (USACE NID)
Pine Hollow Reservoir is a man-made reservoir impounded by the Pine Hollow (completed 1969), built primarily for irrigation on the Badger Creek & Pine Hollow Creek; earth-type dam, 66 ft tall and 800 ft long.
- Surface area
- 235 ac
- Normal storage
- 4,750 ac-ft
- Max storage
- 5,300 ac-ft
- Drainage area
- 4.5 sq mi
- Hazard class
- High
- Owner
- BADGER IMPROVEMENT DISTRICT
All listed purposes: Irrigation;Recreation.
Source: USACE National Inventory of Dams, NID ID OR00480 · Operator website
Nearby Lakes in Wasco County
Frequently asked questions about Pine Hollow Reservoir
Where is Pine Hollow Reservoir?
- Pine Hollow Reservoir is a lake in Wasco County, Oregon. Its water-quality measurements are published by Oregon DEQ and shown on this page as reported.
What is the water quality of Pine Hollow Reservoir?
- Pine Hollow Reservoir in Wasco County, Oregon has water-quality measurements published by Oregon DEQ, shown here as reported. Chlorophyll-a (algae): 4.5 µg/L. Surface area: 235 acres.
Is Pine Hollow Reservoir safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Pine Hollow Reservoir?
- No published bathymetric survey covers Pine Hollow Reservoir, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 21 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate. The lake covers 235 acres.
Are there boat ramps on Pine Hollow Reservoir?
- Pine Hollow Reservoir has 2 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Pine Hollow Reservoir South Shore, Pine Hollow Reservoir Resort. Public access is listed as yes.
Can I fish at Pine Hollow Reservoir?
- Pine Hollow Reservoir 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 Oregon's fish and wildlife agency, so check its current regulations before you go.
Explore Pine Hollow Reservoir across LakeQuality
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2 thermal springs within 21.7 mi, nearest Mount Hood Fumaroles
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Where this data comes from
8 measurements from 1 monitoring station, 2024–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Department of Environmental Quality - State of Oregon
OREGONDEQ8 samples · 2024–2025
Analytical methods
- 10200 H ~ Chlorophyll a-b-c Determination
Monitoring station identifiers (1)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.
Other records on this page
Lake size & watershed from HydroLAKES (HydroSHEDS)
Named boat-access points from the USGS National Boat Ramps inventory