Big Arm State Park
Big Arm State Park is located on the western shore of Flathead Lake and less than 20 minutes outside of Polson, MT.
Flathead is the largest natural freshwater lake in the western United States. Twenty-eight miles long and 15 miles wide, Flathead Lake is renowned for its beauty.
Looking to camp?
The park has both flush and vault toilets, tent/RV sites, bear-resistant storage lockers, boat trailer parking, sheltered picnic tables, drinking water, grills/fire rings, firewood, picnic tables, trash cans, and coin-operated showers. RV/trailer size is limited to 30 feet in the 41 site campground.
There are also seven tent-only campsites available. Big Arm has also added two yurts, including one that is entirely ADA accessible. Plans for more yurts, cabins and other accommodations are in the works.
You will need a joint state/tribal for fishing license or fishing at this park, and campers may stay only 14 days during a 30-day period. Pets are required to be on leashes. Fees are charged for day use and camping.
- Lounge on the long pebble beach or take a dip in the lake to cool off.
- Come prepared with your joint state/tribal fishing license if you want to try and catch a big one!
- Take a scenic hike on the trail, which provides outstanding views of the mountains.
- Catch a glimpse of wildlife, including birds, deer, and even a bear from time to time
- Spend a day on the lake boating, skiing or wakeboarding
- Experience a feeling of tranquility while camping under a collection of mature ponderosa pine and juniper trees
- Plus so many more!
- Open April through October
- Day-Use Area Open Year-Round
- 217 acres
- ADA Accessible
- Pets Allowed
- Toilets (Vault & Flush)
- Firewood for Sale
- Picnic Shelter
- Boat Launch
On Flathead Lake's Big Arm Bay, this park is a popular destination for camping, swimming, fishing, picnicking, and as a jump-off point to Wild Horse Island.
Big Arm's pebble beach is a popular place to get your feet wet or take a swim in the lake.
Mature pine and fir trees surround the campsites at the park. Other activities at the park include fishing for lake trout, boating, fishing, swimming, camping, picnicking, bicycling, hiking the park trails, wildlife viewing, scuba diving, and water-skiing.
The water in Ackley Lake comes from the Judith River and is stockpiled for irrigation use!
Curious what other visitors have had to say about the park?
Day use area open year-round
Open April through October
Available mid-May through mid-September
Shower House & Flush Toilets
Open mid-May through mid-September
Normally available mid-March through November, weather permitting.
28031 Big Arm State Park Road
Big Arm, MT 59910