How much does camping cost at Big Arm Unit - Flathead Lake State Park?

Camping fees at Big Arm Unit - Flathead Lake State Park range from $8-$60/night. Prices may vary by site type (standard, hookup, premium) and season. Book online to see exact pricing for your dates.

Is Big Arm Unit - Flathead Lake State Park first-come first-served or reservation?

Big Arm Unit - Flathead Lake State Park accepts online reservations. We recommend booking in advance, especially during peak season (typically summer weekends). Use campsite alerts to get notified when spots become available.

Can I see photos of campsites at Big Arm Unit - Flathead Lake State Park before I book?

Yes! Big Arm Unit - Flathead Lake State Park has 6 campsite photos on Outdoorithm, contributed by campers who've stayed there. Browse real photos of individual sites to see what to expect before you reserve. You can also add your own photos after your trip to help the next family plan theirs.

What is the best time to visit Big Arm Unit - Flathead Lake State Park?

Big Arm Unit - Flathead Lake State Park is open Exact peak season dates not specified.. The best time to visit depends on your preferences—summer offers the warmest weather and most activities, while spring and fall provide fewer crowds and milder temperatures. Check current conditions before your trip.

Are there showers at Big Arm Unit - Flathead Lake State Park?

Yes, Big Arm Unit - Flathead Lake State Park has shower facilities available for campers. Check the amenities section for details on hours and any fees.

Can I have a campfire at Big Arm Unit - Flathead Lake State Park?

Fire policies at Big Arm Unit - Flathead Lake State Park: Campfires are allowed in designated fire rings only.. Always check current fire restrictions before your trip, as conditions change seasonally.

How many campsites does Big Arm Unit - Flathead Lake State Park have?

Big Arm Unit - Flathead Lake State Park has 40 campsites. Sites vary in size, privacy, and amenities. Check availability online to find the best site for your needs.

Are dogs allowed at Big Arm Unit - Flathead Lake State Park?

Yes, pets are allowed at Big Arm Unit - Flathead Lake State Park. Dogs must typically be kept on a leash (usually 6 feet or shorter) and under control at all times. Be sure to clean up after your pet and check for any breed or size restrictions.

What amenities are available at Big Arm Unit - Flathead Lake State Park?

Big Arm Unit - Flathead Lake State Park offers: Restrooms, Showers, Potable Water, Pets Allowed. See our detailed campground page for the full list of facilities and features.

What activities can I do at Big Arm Unit - Flathead Lake State Park?

Popular activities at Big Arm Unit - Flathead Lake State Park include Hiking, Fishing, Swimming, Boating, Wildlife Viewing, Beach Activities. The surrounding area offers plenty of outdoor recreation opportunities for all skill levels.

Big Arm Unit - Flathead Lake State Park

4.52

84 reviews

28031 Big Arm State Park Rd., Big Arm, Montana, 59910, United States

Top 4% in MTSummer

Pet FriendlyScenic ViewsSwimmingSummer Destination

Featured in:Summer Camping Montana Swimming Camping Montana

Real-Time Availability

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Quick Facts

2,982 ft

Price

$8 - $60/night

Booking

Reservable

Sites

40 campsites

Season

Campground Open Apri...

Cell

Unknown

Pets

Very Pet Friendly

Top 2% in state

RV FriendlyShowers

Book on Montana State Parks Official Website

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Real-Time Availability

Select a month, then check for open campsites

Quick Facts

2,982 ft

Price

$8 - $60/night

Booking

Reservable

Sites

40 campsites

Season

Campground Open Apri...

Cell

Unknown

Pets

Very Pet Friendly

Top 2% in state

RV FriendlyShowers

Book on Montana State Parks Official Website

Get Directions

Big Arm Unit - Flathead Lake State Park

$8.00 - $60.00 / night

Campsite Fees

Campsite fees range from $4-$34 per night, depending on season and available amenities. Visit Reserve America to check fees and reserve...

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Provider

4068373041

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Campground Map

28031 Big Arm State Park Rd., Big Arm, Montana, 59910, United States

Big Arm Unit - Flathead Lake State Park

28031 Big Arm State Park Rd., Big Arm, Montana, 59910, United States

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.

Weather at Big Arm Unit - Flathead Lake State Park

Best Time to Camp at Big Arm Unit - Flathead Lake State Park

Summer brings daytime highs in the mid-60s to mid-70s with evenings in the 50s. Warm enough for swimming and boating but cool enough for campfires. Water temperatures rise enough for comfortable lake activities, and daylight stretches long. Sites book up fast during this season. Winter transforms the area with snowfall and freezing temperatures, though the campground remains open year-round. Autumn turns surrounding forests gold before the first snows arrive.

Best

Summer(Jun-Aug)

5.0 / 5

Top 4% in MT

Peak season: ideal temps, swimming/boating/fishing draw crowds and sites fill quickly.

Planning Tips

Peak Season: Exact peak season dates not specified.. Book 2-3 months ahead.
Operating Season: Campground Open April through October

About Big Arm Unit - Flathead Lake State Park

Big Arm Unit sits on the southwest shore of Flathead Lake. The largest natural freshwater lake west of the Mississippi. Within the Flathead Indian Reservation. The campground has 40 sites plus 3 yurts, with flush toilets, hot showers, and direct lake access. Sites fill quickly in summer when boat launches, swimming, and fishing draw the biggest crowds.

The campground accommodates tent camping, RVs, and yurt rentals. Sites are located along the shoreline and include accessible ADA-designated spots.

Historical Significance

The campground sits within the Flathead Indian Reservation, home to the Confederated Salish and Kootenai Tribes. Fishing on the lake requires a tribal fishing license, which supports conservation efforts and honors tribal sovereignty over these waters.

Weather and SeasonsSummer brings daytime highs in the mid-60s to mid-70s with evenings in the 50s. Warm enough for swimming and boating but cool enough for campfires. Water temperatures rise enough for comfortable lake activities, and daylight stretches long. Sites book up fast during this season. Winter transforms the area with snowfall and freezing temperatures, though the campground remains open year-round. Autumn turns surrounding forests gold before the first snows arrive.

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 SceneryNestled among mature ponderosa pines and junipers on Big Arm Bay along the western shore of Flathead Lake, Montana's largest natural freshwater lake. Offers spectacular views of the Mission and Swan mountain ranges, a long pebble beach, and elevation of 2,953 feet across 217-240 acres.[1][2][3][4]

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.

Scenic ViewsDirect lakefront sites offer breathtaking views of Flathead Lake and the surrounding mountains. Many sites are described as 'right on the water.'

Lodging & AccommodationsThe park features 3 yurts available for rent. These yurts are described as clean, comfortable, and well-equipped. For example, one user stated, 'The beds were very comfortable. My favorite part was the skylight at the top of the yurt.' They also include a tent pad adjacent to the yurt for guests. Rates for yurts range from $50 to $60 per night, plus a $10 reservation fee, according to user reports.

Programs & ActivitiesNo specific information is available about cultural or educational programs.

Best Campsites

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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.

Tents

Tents are allowed

RV vehicles

RV vehicles are allowed

Primitive

Primitive camping is not allowed

Reservable

Reservations are allowed

Site layoutMost sites run parallel to the campground roads, which makes for tight spacing in places. Reviews mention sites are close together, with parking areas that barely fit a car and camper in some spots. Other campers describe spacing as adequate. Double sites can hold up to 16 people and two camping units, while standard sites fit one unit and vary in their ability to accommodate larger RVs alongside vehicles.

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.

AccessibilitySome yurts, cabins, and group facilities are ADA-accessible. Additionally, designated ADA campsites are available, but proof of disability is required for reservation.

Site 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.

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 SitesChoose lakefront sites for the best views and easy access to the water. Tent campers should look for flat grounds to avoid discomfort.

Best CampsitesMany of the 41 campsites are situated along the shoreline for lake views; majority right near the water edge except sites A1-A3 and B17-B22. One wheelchair accessible site and three yurts (Mission 20’ diameter, Salish/Swan 16’ diameter with one ADA accessible).[1][2][3][6]

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Amenities available

Big Arm Unit at Flathead Lake State Park offers a variety of amenities designed to enhance the camping experience. The campground has shower facilities, flush toilets, and 40 campsites, many of which are located along the shoreline. Additionally, there are 3 yurts available for rent. The park has a designated boat ramp, dock, and a picnic area with picnic shelters. Campers can enjoy access to potable water at spigots and purchase firewood and ice from the camp hosts. A campground host is present on-site, and the park is equipped with vault toilets as well.

Showers

Potable water

Flush toilets

Fire rings

Picnic tables

Firewood available

I manage this campground

RV details

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

Fishing

Swimming

Boating

Wildlife viewing

Beach activities

Planning your trip?Check out our camping packing checklist

Policies & Safety

Hazards & AlertsBear activity is noted; campers are advised to store food in airtight containers or cars. Some sites have inclined ground, which may affect sleeping comfort.

No Electric HookupsElectric hookups are not available at this campground. RV campers should arrive with a full battery and plan for off-grid power (generator hours/quiet rules permitting).

No Water HookupsSite-level water hookups are not available. RV campers should fill freshwater tanks before arrival; check the No Potable Water note above if applicable for drinking water.

No Dump StationThere is no dump station at this campground. Plan to use a dump station along your route or at a nearby facility before or after your stay.

Fire PolicyCampfires are allowed in designated fire rings only.

Quiet HoursQuiet hours are 10:00 PM to 7:00 AM.

Emergency ServicesEmergency services are available via 911. No specific nearby hospitals or police stations were mentioned.

Trash & RecyclingTrash must be placed in bear-proof dumpsters to avoid attracting wildlife. Specific recycling facilities were not mentioned.

Water FeaturesFlathead Lake surrounds the campground, with direct beach access for swimming, boating, and fishing.

Camp HostHosts sell firewood and ice and are generally described as friendly and helpful.

Cell CoverageCell service available for AT&T, Verizon, and T-Mobile.[1]

Trip Planning Tools

Set an AlertGet notified when sites open up Check WeatherHistorical weather data Gear for This TripMatched gear recommendations Packing ListCustomizable checklist

Questions & answers

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Tips from campers

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Reviews

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From Booking Sources

4.5

84 reviews

Top-Rated

Big Arm Unit - Flathead Lake State Park is top-rated, placing it in the top 15% 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

Based on 84 reviews

What Campers Love

Stunning lake and mountain views, shoreline sites, pebble beach for swimming/sunbathing, mature pines/juniper camping, access to boating/fishing, peaceful nature spot.[1][2][3]

Based on 84 reviews

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...

Based on 84 reviews

Site-Specific Reviews

- Site B2 is 'really enjoyable,' according to one user. - Many sites are directly along the shoreline, providing easy beach access.

Based on 84 reviews

Pro Tips & Recommendations

Bring own potable water outside mid-May to mid-September; use bear-resistant storage lockers; tribal fishing license needed; pets on leashes; max 14-day stay in 30-day period; reservations up to 9...

Based on 84 reviews

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...

Based on 84 reviews

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...

Based on 84 reviews

Accessibility Features

Some reviews mention ADA-accessible yurts and campsites, but no user-specific accessibility experiences were documented.

Based on 84 reviews

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.

Based on 84 reviews

Outdoorithm Community

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Go if

Lake campers who want a shoreline site, especially B2, will get the most out of this place. Bring a boat or kayak, grab a tribal fishing license before you arrive, and book early since summer fills fast and reservations open nine months out.

Skip if

Big rigs may struggle: some sites barely fit a car and camper, with overflow parking on the road. If you're towing a large trailer or need hookups, there are none here, electric or otherwise.

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Lake Mary Ronan State Park sits 7 miles west of Flathead Lake, offering 25 campsites beneath Douglas fir and western larch. The campground draws families and anglers with direct lake access, a boat launch, and swimming areas. Eighteen sites accept reservations; the rest operate first-come, first-served. Reviewers consistently praise the helpful camp hosts and clean facilities, though the park lacks an RV dump station.