Lake trip · Carbon County, Montana
Where to stay at Cooney Reservoir
Cooney Reservoir covers - in Carbon County and carries a water-quality grade of A (Excellent). Compare cabins, resorts, and vacation rentals below, then check the water before you book. Late spring through early fall, with June through August the peak season for swimming, boating, and fishing.
Places to stay near Cooney Reservoir
Cabins, resorts, hotels, and vacation rentals near Cooney Reservoir in Carbon County, Montana — live availability and prices. Add your dates to see totals.
Top-rated places to stay near Cooney Reservoir
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Before you book: the water
Cooney Reservoir grades A for water quality — Excellent. Excellent for swimming, crystal clear water with minimal algae. Water clarity is about 12.5 ft of visibility. Algae (chlorophyll-a) measures 2.6 µg/L.
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 Cooney Reservoir →
About Cooney Reservoir
Camping & RV near Cooney Reservoir
Search public campgrounds and RV sites near Cooney 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 Cooney Reservoir in Carbon County, Montana 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.
Cooney Reservoir has a LakeQuality water-quality grade of A (Excellent). Excellent for swimming, crystal clear water with minimal algae. 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.
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LakeQuality Lake Trip Planner (2026)
Free trip-planning guide for Cooney 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.