Big Arm Unit - Flathead Lake State Park
00 review28031 Big Arm State Park Rd., Big Arm, Montana, 59910, United States
Big Arm Unit - Flathead Lake State Park
$8.00 - $60.00 / night
Campsite Fees
Standard Site Fee$0.00
Hookup Site Fee$0.00
Premium Site Fee$0.00
Hike and Bike Site Fee$0.00
Group Site Fee$0.00
Food Storage Locker Fee$0.00
Yurt rates range from $50 to $60 per night plus a $10 reservation fee. Entrance fee is $8 for out-of-state vehicles.
About this campground
Nestled along the pristine southwest shore of Flathead Lake, Big Arm Unit beckons outdoor enthusiasts to experience Montana's crown jewel from within the sacred lands of the Flathead Indian Reservation. This waterfront haven features 40 thoughtfully positioned campsites and 3 cozy yurts, each offering easy access to the crystalline waters that stretch endlessly toward the horizon. Modern amenities including flush toilets and hot showers ensure comfort after days spent swimming in the lake's refreshing waters, launching boats for island explorations, or casting lines for the legendary trout that call these depths home.
The campground accommodates tent camping, RVs, and yurt rentals. Sites are located along the shoreline and include accessible ADA-designated spots.
Historical SignificanceBig Arm Unit sits on the ancestral lands of the Confederated Salish and Kootenai Tribes, offering visitors a chance to connect with the deep cultural heritage of this sacred landscape. The campground serves as a gateway to understanding the profound relationship between the tribal nations and Flathead Lake, where fishing traditions have been passed down through countless generations. Anglers wishing to cast their lines in these storied waters must obtain a tribal fishing license, a requirement that honors the sovereignty of the Flathead Indian Reservation and supports the conservation efforts that keep these waters pristine for future generations.
Weather and SeasonsExperience the dramatic beauty of Montana's changing seasons at Big Arm Unit, where each time of year paints the landscape in different hues. Summer transforms the campground into a sun-drenched paradise, with comfortable temperatures in the mid-70s perfect for lake activities, while evening temperatures dip into the 50s—ideal for gathering around the campfire. As autumn arrives, the surrounding forests burst into golden flames before winter blankets the region in pristine snow, creating a serene wonderland where freezing temperatures and snowfall transform the familiar shoreline into an entirely different world.
ElevationWhile specific elevation details await confirmation, Big Arm Unit's lakeside position places visitors at the perfect vantage point to experience both the vast expanse of Flathead Lake and the towering peaks that frame this natural amphitheater.
Natural Features and SceneryWake to breathtaking panoramas where the shimmering waters of Flathead Lake meet the dramatic skyline of the Mission Mountains, their snow-capped peaks reflected in the morning calm. This stunning backdrop serves as home to an abundance of wildlife, where curious chipmunks dart between towering pines and visitors might glimpse deer grazing at dawn or eagles soaring overhead. The campground's prime location on the lake's southwest shore ensures spectacular sunrises paint the mountains in alpenglow, while evenings bring equally mesmerizing displays as the setting sun transforms the water into liquid gold.
Geological RegionPositioned along the southwest shore of Flathead Lake—the largest natural freshwater lake west of the Mississippi—Big Arm Unit offers front-row seats to one of North America's most spectacular geological wonders. From this vantage point within the Flathead Indian Reservation, the majestic Mission Mountains rise dramatically from the valley floor, their ancient peaks carved by glaciers into sharp ridges and deep valleys. This unique location places visitors at the intersection of water and stone, where the geological forces that shaped this landscape over millions of years continue to inspire awe in all who witness their grandeur.
Campsite details
AccessibilitySome yurts, cabins, and group facilities are ADA-accessible. Additionally, designated ADA campsites are available, but proof of disability is required for reservation.
Sites SizeSites are described as accommodating various setups, including tent camping and RVs. Many sites can fit a single camping unit, and double sites can accommodate up to 16 people and two camping units.
Sites PrivacyUser reviews suggest varied site privacy. Some describe sites as well-spaced ('sites are well spaced apart'), while others mention they are close together ('campsites were a little tight together').
Total Campsites40 campsites
Recommended CampsitesChoose lakefront sites for the best views and easy access to the water. Tent campers should look for flat grounds to avoid discomfort.
Best CampsitesSites near the water are highly praised. Site B2 is specifically mentioned as enjoyable.
Reserving a campsite
Check-in
2:00 PM
Check-out
1:00 PM
Stay Limit
Stay limits for general campsites are not explicitly mentioned.
Guests Allowed Per Site
Maximum of 8 people per campsite, 16 for double sites.
Groups
No specific information about group sites was provided.
Tents
Tents are allowed
RV vehicles
RV vehicles are allowed
Primitive
Primitive are not allowed
Reservable
Reservations are allowed
Site layoutMany sites are parallel to roads, making them tight but still functional for tents and RVs.
Open and Closed SeasonCamping season ends on November 1, exact reopening not specified.
Reservation PlatformsReservations can be made online via the Montana State Parks website.
Walk-in AvailabilitySome user reviews report success in finding last-minute walk-up spots even when online reservations indicate full occupancy.
Cancellation PolicyReservations are non-transferable and cannot be sold, bartered, or traded. Cancellation fee applies if disability ADA requirements are not met.
Amenities available
Showers
Potable water
Fire rings
Picnic tables
Firewood available
Lodging and accommodations
Flush toilets
Vault toilets
Activities you can enjoy
The Big Arm Unit offers a wide range of recreational opportunities. Activities include swimming, sunbathing, boating, fishing, and hiking on the nature trail. The park is a popular launch point for boat trips to Wild Horse Island.
Hiking
Hiking trails are available, including a short 2-mile hike, as noted by one user: 'Short 2mi hike.' Specific difficulty levels or trail conditions were not detailed.Fishing
Fishing is a popular activity here. However, a Confederated Salish and Kootenai Tribe fishing license is required. The fishing experience is described by a user as 'very nice with phenomenal views.'Swimming
The park features swimming areas and beaches, which are highly appreciated by visitors. One user stated, 'Awesome beaches for swimming,' and another mentioned, 'lots of spots to swim.'Boating
Boating is a major activity at the park, facilitated by a designated boat launch and dock. One user praised the facilities, saying, 'Boat launch and dock made getting in and out to the lake easy.'Wildlife viewing
Wildlife viewing opportunities include observing local fauna like chipmunks. One user noted, 'Chipmunks were everywhere, running and chattering.'Beach activities
Beach activities are popular, with visitors enjoying sunbathing and playing in the water. 'Nice beaches for swimming' and 'many spots with shade and open areas' were highlighted by users.Winter Activities
No information about winter-specific activities has been provided.Water Sports
Non-motorized water activities like kayaking or paddleboarding were not specifically mentioned but may be implied through general boating activities.Campground rules
- Pets are allowed
- Campfires are allowed in designated fire rings only.
- Quiet hours are 10:00 PM to 7:00 AM.
Hazards
General hazardsBear activity is noted; campers are advised to store food in airtight containers or cars. Some sites have inclined ground, which may affect sleeping comfort.
Active alertsNone mentioned.
Weather forecast
90
°F
Aug 25
Monday
Overcast
Precipitation: 0%
Moderate wind, may affect light items
Humidity: 13%
Very dry conditions, stay hydrated
Wind: 4.1 mph
Moderate wind, may affect light items
Overcast
7-Day Forecast
Access to 7-day forecasts tailored to each campground—covering temperature, precipitation, wind, and sky conditions.
Daily & Hourly Insights
View hourly forecasts with expected weather patterns throughout the day.
Temperature Trends
Visualize how temperatures shift over the month to help pick the most comfortable days for your trip.
Precipitation Trends
Plan around rain or snow with monthly visualizations of expected precipitation patterns.
Weather Summaries
Assess conditions with visuals for easier decision-making on when and where to camp.
Weather data powered by Open-Meteo
Emergency Services
Emergency services are available via 911. No specific nearby hospitals or police stations were mentioned.
Good to know
Peak season datesExact peak season dates not specified.
Trash and recyclingTrash must be placed in bear-proof dumpsters to avoid attracting wildlife. Specific recycling facilities were not mentioned.
Proximity to water featuresFlathead Lake surrounds the campground, with direct beach access for swimming, boating, and fishing.
Common complaintsSites can be tight together, and bear-proof containers are absent. Some users disliked the parking setup where cars and campers barely fit into designated areas.
HostHosts sell firewood and ice and are generally described as friendly and helpful.
Campground Map
28031 Big Arm State Park Rd., Big Arm, Montana, 59910, United States
Driving directionsBig Arm State Park is located 13 miles north of Polson on U.S. 93.
Access is straightforward via U.S. 93, a major paved highway. No seasonal closures are mentioned.Nearby places
Polson (13 miles, approximately 20 minutes driving), null for other cities
Nearby supplies
Supplies such as firewood and ice are sold at the campground by camp hosts. Other grocery or supply locations are not specified.
Camper Reviews
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0 reviews
Big Arm Unit - Flathead Lake State Park has limited reviews, placing it in the bottom % of campgrounds based on reviews
User reviews for Big Arm Unit at Flathead Lake State Park are overwhelmingly positive, with praise for its cleanliness, beautiful lake views, and friendly camp hosts. However, some users raised concerns about tight campsites and parking limitations.
Review Summaries
What Campers Love
- Clean bathrooms and showers.
- Friendly and helpful camp hosts.
- Stunning lakeside views.
- Easy access to the lake for swimming and boating.
- Availability of firewood and ice on-site.
Common Concerns
- Limited parking at some sites, requiring campers to park on the roadway.
- Some campsites are described as tight or crowded.
- Flush toilets are located far from certain campsites.
- Potential bear...
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Pro Tips & Recommendations
- Reserve campsites in advance as they fill up quickly.
- Bring additional heaters for yurt stays during cooler nights.
- Follow all food storage guidelines to avoid attracting bears.
Seasonal Insights
Summer reviews highlight the popularity of swimming, boating, and sunbathing, while cooler seasons bring attention to yurt accommodations for warmth and comfort. Availability during peak seasons is...
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Camper Quotes
- 'Camp site was nice and big. Right on the water.'
- 'Bathrooms had a shower. Had a good day and night.'
- 'The camp hosts were great. Very friendly and jovial.'
- 'Stunning lake views and very...
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Site-Specific Reviews
- Site B2 is 'really enjoyable,' according to one user.
- Many sites are directly along the shoreline, providing easy beach access.
Accessibility Features
Some reviews mention ADA-accessible yurts and campsites, but no user-specific accessibility experiences were documented.
Pet-Friendly Features
Pets are allowed but must be leashed, as reminded by camp hosts. 'Dog loved every minute we were there,' shared one user.
Last updated August 10, 2025