Flathead Lake
Big Arm, Flathead Lake State Park
Public state park with day use and reservable camping
Not determined here; check park alerts and Montana HAB guidance
Yes. Big Arm offers public swimming from a pebble beach. The park is year-round, with day use from 8:00 a.m. to 10:00 p.m. and seasonal water and restroom services.
Plan the access
- Access status
- Montana FWP lists swimming and a pebble beach
- Who can use it
- Public state park with day use and reservable camping
- Manager
- Montana Fish, Wildlife & Parks
- Published hours
- Park year-round; day use 8:00 a.m.–10:00 p.m.; no overnight day-use parking
- Published fees
- Montana resident vehicle-fee rules apply; nonresidents $8 vehicle or $4 walk/bike
- Reservation
- Camping and yurts reservable; no ordinary day-use reservation stated
- Lifeguards
- Not stated on the manager page
- Parking
- On-site parking listed; no capacity published
- Water conditions
- Not determined here; check park alerts and Montana HAB guidance
Confirm before leaving
Open official manager page ↗Check condition source ↗Official pages and signs override this guide.
Park access and tribal-land rules have a boundary
Big Arm lies outside the Flathead Reservation and the state-park page says no tribal recreation permit is required there. Recreation on nearby tribal land can require one; the park rule should not be generalized beyond the unit.
Facilities change seasonally
The manager lists potable water, showers, and flush toilets from roughly mid-May through mid-September. Dock availability is weather-dependent and should be checked separately from shoreline swimming access.
Access facts last checked against the linked manager on 2026-08-02. This date is not a water sample or a promise of present conditions.