Montana, USA
Big Arm is located on Big Arm Bay of Flathead Lake, featuring ponderosa pine and juniper forests. The campground provides 41 campsites, three yurts, and one group site.
28031 Big Arm State Park Rd., Big Arm, MT; geographic park point.
Checked October 8, 2026: Campground open April through October. Confirm current closures and dates with the operator; no later-year opening or live availability is guaranteed. Month/day schedules without an explicit year are recurring schedules observed in 2026, not a confirmed 2027 calendar. Confirm current closures, services and dates with the operator; no live availability is guaranteed.
The park provides fishing access on Flathead Lake. A tribal fishing license is required for the southern half of the lake. Check current local fishing rules before fishing.
Source checked 2026-10-08: Official park campground page.
Official reservations — non-affiliate link. FishFinder does not show live availability or take bookings.
Only source-reviewed listings are shown. Unverified seed listings are withheld. Official links are not live availability; confirm dates, closures, access and fishing rules with the operator before travel.
Plan your stay at Big Arm Unit — Flathead Lake State Park Campground in Montana, USA using the official campground information above. Confirm current closures, operating dates and reservation availability before travelling.
Related water guides include Flathead Lake. A nearby waterbody does not guarantee a launch, legal fishing access or safe wading from the campground. Check the official rules for your exact fishing location.
Explore these water guides for fishing locations near Big Arm Unit — Flathead Lake State Park Campground: