Big Arm / Flathead Lake
Camp, hike and swim in this beautiful setting on Flathead Lake among mature ponderosa pines, juniper trees and spectacular views of the Mission Mountains.
Day use area open year-round
Open May through October.
Available mid-May through mid-September.
Shower House & Flush Toilets
Normally, available mid-March through November, weather permitting. For status updates please visit our Facebook page or call Flathead Lake State Park Ranger Station, 406-837-3041
For Waves & Wind Forecast, check NOAA Graphical Flathead Lake Forecast
28031 Big Arm State Park Rd.
Big Arm, MT 59910
Latitude/Longitude: (47.80534 / -114.31339)
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Big Arm / Flathead Lake State Park
8600 MT Hwy 35
Bigfork, MT 59911
May - September:
Direct Park Line 406-849-5256
Flathead Lake State Park Ranger Station 406-837-3041
Big Arm / Flathead Lake
Don't miss Flathead Lake State Park special events and programs held throughout the summer!.
Big Arm is located on Flathead Lake, the largest natural freshwater lake in the western United States. Twenty-eight miles long and 15 miles wide, Flathead Lake is renowned for its fishing.
Located on the lake's Big Arm Bay, its long pebble beach is popular with sunbathers and swimmers. Camping under a stand of mature ponderosa pine and juniper is a major attraction. The hiking trail provides excellent vistas of surrounding mountain ranges and high peaks with abundant watchable wildlife opportunities. Other opportunities include: fishing for lake trout, board sailing, boating, swimming, camping, picnicking, bicycling, hiking the 2.5 mile trail, wildlife viewing, scuba diving, and water-skiing.
This site is 2,953 feet in elevation and covers 217 acres. The campground has 41 campsites, including one wheelchair accessible site; one group campsite; and three yurts. Maximum RV/trailer length is 40 feet. Bear resistant storage lockers are available.
Yurts offer the latest in circular camping comfort! The Mission yurt is 20’ in diameter, Salish and Swan are 16’ in diameter, and the Swan yurt is ADA accessible. All yurts have furniture, electrical outlets, lights, and electric heat. Yurt sites includes a picnic table and a fire pit for cooking.
A joint state/tribal fishing license is needed for fishing at this park and campers may stay only 14 days during a 30 day period. Pets are required to be on leashes.
Big Arm is a popular jumping-off point to Wild Horse Island, a 2,163-acre island in Flathead Lake State Park, located off the west shore of the lake. The island is home to bald eagles, bighorn sheep, yellow-pine chipmunks, and wild horses. Wild Horse Island is accessible only by boat.
- Bird Watching
- Group Camping
- Lake Fishing
- Motor Boating
- RV Camping
- Tent Camping
- Water Skiing
- Wildlife Viewing
- Wind Surfing
Some amenities are seasonal. Check with the park for availability.
- ADA Accessible
- Bear Resistant Storage Lockers
- Boat Launch
- Established Fire Pits
- Firewood for Sale
- Grills/Fire Rings
- Pets Allowed
- Picnic Shelter
- Public Restroom
- Toilets (Flush)
- Toilets (Vault)
- Trash Removal