Lake trip · Fallon County, Montana
Where to stay at South Sandstone Reservoir
South Sandstone Reservoir covers 108 acres in Fallon County. Compare cabins, resorts, and vacation rentals below. The water-quality readings cover nutrients and algae; they are not a stay-or-skip rating. Late spring through early fall, with June through August the peak season for swimming, boating, and fishing.
Places to stay near South Sandstone Reservoir
Cabins, resorts, hotels, and vacation rentals near South Sandstone Reservoir in Fallon County, Montana — live availability and prices. Add your dates to see totals.
Top-rated places to stay near South Sandstone Reservoir
Prices for Oct 16–18, 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
South Sandstone Reservoir has limited nutrient and algae sampling on record. A water-quality reading is not a swimming clearance. The state water agency and county health departments post current advisories; check them before you swim. The readings are not a reason to skip cabins and rentals around the lake.
See the full South Sandstone Reservoir water-quality report →
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 South Sandstone Reservoir →
About South Sandstone Reservoir
Camping & RV near South Sandstone Reservoir
Search public campgrounds and RV sites near South Sandstone 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 South Sandstone Reservoir in Fallon 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.
South Sandstone Reservoir has limited nutrient and algae sampling on record. A water-quality reading is not a swimming clearance. The state water agency and county health departments post current advisories; check them before you swim.
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 South Sandstone 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 readings are independent of lodging listings. Always check current health-department advisories and managing-agency conditions before you travel.