Big Arm State Park is a 217-acre site on Big Arm Bay, on Flathead Lake's western shore. Big Arm is a popular launch point for visitors headed to nearby Wild Horse Island.
Amenities include flush and vault toilets, tent and RV campsites, bear-resistant storage lockers, boat trailer parking, public phone, picnic tables, potable water, grills and fire rings, firewood, and coin-operated showers. A yurt is available for rent as well.
Activities include fishing, board sailing, boating, swimming, bicycling, scuba diving, and water-skiing.
Full-service camping is available May 1 to September 30, with limited services available through mid-November. Be aware that a Confederated Salish & Kootenai Tribal fishing license, available in Polson, is required to legally fish at Big Arm.