Montana Fish Wildlife and Parks

COVID-19 Response: Montana State Parks are open for DAY USE ONLY until further notice.     Learn More »

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Big Arm / Flathead Lake


Photo of smiling grandmother surrounded by her grandchildren inside a tent. Photo of two dome tents along Flathead Lake. Photo of man and girl on jet-ski on Flathead Lake with catamaran in background. Photo of kids in mid-air leaping off raft into Flathead Lake.

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.


Food Storage Rules: Store all attractants, day or night, in a closed, hard sided container or vehicle when not in immediate use. Tent campers without a vehicle may use available food lockers. Do not burn waste in fire ring or leave litter around camp-site. Dispose of garbage in bear-resistant dumpsters provided.


Day use area open year-round

Due to mild weather, the campground is now open for the 2020 season.
Yurts will be available for rent May 1.

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

Water and Shower House
Available mid-May through mid-September.

28031 Big Arm State Park Rd.
Big Arm, MT 59910
Latitude/Longitude: (47.80534 / -114.31339)
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Reserve Campground

Campground Map

Trail Map

Montana State Parks Guide

photo of Amy Grout
Amy Grout began her career in Montana State Parks in 2004 as an intern at Lone Pine State Park, later becoming the Northwest District Park Ranger. Amy manages Flathead Lake State Park - Finley Point, Big Arm, Yellow Bay, Wayfarers and Wild Horse Island. She has a B.A. in Parks and Protected Area Management from Colorado State University at Fort Collins. Speaking about her love of the outdoors, Amy said, “Most of my childhood was spent outside of Anchorage, Alaska and so that is the one place I consider my hometown and where my love for the outdoors really began. “


Mailing Address:
Big Arm / Flathead Lake State Park
Ranger Station
8600 MT Hwy 35
Bigfork, MT 59911

Phone: May - September:
Direct Park Line 406-849-5256
Year-round Phone:
Flathead Lake State Park Ranger Station 406-837-3041

Big Arm / Flathead Lake



  1. Bird Watching
  2. Boating
  3. Camping
  4. Canoeing
  5. Fishing
  6. Group Camping
  7. Hiking
  8. Kayaking
  9. Lake Fishing
  10. Motor Boating
  11. Photography
  12. Picnicking
  13. RV Camping
  14. Sailing
  15. Swimming
  16. Tent Camping
  17. Water Skiing
  18. Wildlife Viewing
  19. Wind Surfing

Some amenities are seasonal. Check with the park for availability.
  1. ADA Accessible
  2. Bear Resistant Storage Lockers
  3. Boat Launch
  4. Campsite
  5. Established Fire Pits
  6. Firewood for Sale
  7. Grills/Fire Rings
  8. Parking
  9. Pets Allowed
  10. Picnic Shelter
  11. Public Restroom
  12. Shower
  13. Toilets (Flush)
  14. Toilets (Vault)
  15. Trails
  16. Trash Removal
  17. Water
  18. Yurt

Big Arm / Flathead Lake State Park

Due to technical issues, the park Google map is temporarily unavailable.

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