Lake trip · Lake County, Montana
Where to stay at Big Arm Bay Lake
Big Arm Bay Lake covers - in Lake 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.
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Places to stay near Big Arm Bay Lake
Cabins, resorts, hotels, and vacation rentals near Big Arm Bay Lake in Lake County, Montana — live availability and prices. Add your dates to see totals.
Top-rated places to stay near Big Arm Bay Lake
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.
About the water
Big Arm Bay Lake has nutrient and algae measurements on record from state and federal monitoring. 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.
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 Big Arm Bay Lake →
About Big Arm Bay Lake
Camping & RV near Big Arm Bay Lake
Search public campgrounds and RV sites near Big Arm Bay Lake on Recreation.gov, then compare cabins, resorts, and rentals on the map above.
Common questions
Frequently Asked Questions
Cabins, resorts, and vacation rentals around Big Arm Bay Lake in Lake 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.
Big Arm Bay Lake has nutrient and algae measurements on record from state and federal monitoring. 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.
Explore Big Arm Bay Lake
Every Montana lake with its published measurements
22.3 mi away · recorded at 113°F
Species activity outlook by water temperature and season
Where to stay at Montana's top lakes, each with its readings
Low nutrients, clear water, excellent for swimming
Montana's cleanest lakes, ranked on agency measurements
LakeQuality Lake Trip Planner (2026)
Free trip-planning guide for Big Arm Bay Lake: 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.