Lake trip · Union County, Oregon
Where to stay at Thief Valley Reservoir
Thief Valley Reservoir covers 807 acres in Union County and carries a water-quality grade of F (Algae-prone). Compare cabins, resorts, and vacation rentals below. The grade measures nutrients and algae — it is not a stay-or-skip rating. Late spring through early fall, with June through August the peak season for swimming, boating, and fishing.
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Places to stay near Thief Valley Reservoir
Cabins, resorts, hotels, and vacation rentals near Thief Valley Reservoir in Union County, Oregon — live availability and prices. Add your dates to see totals.
Top-rated places to stay near Thief Valley Reservoir
Prices for Sep 11–13, 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.
About the water
Thief Valley Reservoir grades F for nutrients and algae — Algae-prone. Algae and nutrients are often high — check current advisories before swimming. Skip the water if you see scum or a paint-like bloom. Algae (chlorophyll-a) measures 51.2 µg/L. The letter is not a reason to skip cabins and rentals around the lake.
Best time to visit
Late spring through early fall, with June through August the peak season for swimming, boating, and fishing.
Check the National Weather Service forecast for Thief Valley Reservoir →
About Thief Valley Reservoir
Camping & RV near Thief Valley Reservoir
Search public campgrounds and RV sites near Thief Valley Reservoir on Recreation.gov, then compare cabins, resorts, and rentals on the map above.
Common questions
Frequently Asked Questions
Cabins, resorts, and vacation rentals around Thief Valley Reservoir in Union County, Oregon are on the map above with live availability and nightly prices. Waterfront rentals put you on the dock; lodging in the nearest town is usually cheaper with more choice.
Thief Valley Reservoir has a water quality grade of F (Algae-prone). Algae and nutrients are often high — check current advisories before swimming. Skip the water if you see scum or a paint-like bloom. Always check local health-department advisories before swimming.
Late spring through early fall, with June through August the peak season for swimming, boating, and fishing.
Explore Thief Valley Reservoir
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LakeQuality Lake Trip Planner (2026)
Free trip-planning guide for Thief Valley Reservoir: how to pick a clean lake, the water-quality signals that matter, best swimming and fishing windows, and where to stay.
Lodging availability and prices are provided by Stay22 and its booking partners (Booking.com, Vrbo, Expedia); LakeQuality may earn a commission from bookings at no extra cost to you. Water-quality grades are independent of lodging listings. Always check current health-department advisories and managing-agency conditions before you travel.