Flathead Lake dominates the camping landscape near Big Arm, Montana, with the lake covering 197 square miles and reaching depths of 370 feet. The camping season typically runs from May through mid-November, with summer daytime temperatures averaging 75-85°F. Most camping sites near Big Arm, Montana provide access to the lake's crystal clear waters where visibility extends up to 30 feet below the surface.
What to do
Boat rentals: Blue Bay Campground offers convenient water access with boat launch facilities and docks. "There's a boat launch, dock and a small area adjacent that you can put in a kayak or floaty. There are picnic tables in the water area easy to setup for your crew," notes one visitor to Lake Mary Ronan State Park.
Wildlife viewing: The region provides opportunities to spot various wildlife species in their natural habitat. A camper at Finley Point Unit observed, "Wildlife like it here too. Saw deer every night." Another visitor mentioned, "The water shallow for a long distance of beautiful colorful rocks and perfect for swimming of all ages."
Hiking trails: Several campgrounds offer hiking opportunities with varying difficulty levels. "There is a hike nearby that will lead you to the top of a mountain and the sunset is even better," shares a camper who stayed at Wayfarers State Park. At West Shore Unit, "There are hiking trails throughout the park. Short-term kayak and SUP rentals are available."
What campers like
Lakefront campsites: Many visitors appreciate the proximity to Flathead Lake. At Big Arm State Unit, "This park is gorgeous, most of the sites are along the water, and there's a boat launch and hiking trails too. Staff is very friendly and the views of the lake and Wild Horse Island are incredible!" Another camper noted, "If you're looking to sleep at the lake, this spot can't be beat."
Swimming opportunities: The clear waters of Flathead Lake are perfect for swimming during summer months. "I was able to get in the water easily. Water is really clear," reports a camper from Big Arm State Unit. At Blue Bay Campground, "There are swimming docks, a boat launch, sunning lawn and a newly added concession stand."
Quiet atmosphere: Many campgrounds offer peaceful settings despite their popularity. "This is a great little campground! All the sites are very nice and it's all very well kept! A small creek runs right through the camp and into the lake, which is crystal clear!" shares a Yellow Bay State Park visitor. At Lake Mary Ronan State Park, a camper described it as a "Very well kept campground, and super nice host. Small lake with beautiful foothills surrounding it."
What you should know
Reservation recommendations: Most lakefront campgrounds fill quickly during peak season. "We have been going by the turn off for Lake Mary Ronan for years. Finally last year we decided to visit this state park with our travel trailer. We loved this campground from the minute we drove in," shares one visitor.
Campground amenities: Facilities vary widely between locations. "The sites are big with good space in between sites. Most of the sites have 50amp electrical hookups. There is a water spigot on the left as you start to go around the campground loop. There is not a dump station at the campground," reports a camper at Lake Mary Ronan State Park.
Tribal lands: Some campgrounds operate under different regulations. At West Shore Unit, "Facilities are clean and nice. Good drinking water. The lake is lovely and super clear. Firewood is available for $8 bundle and they deliver to your site. They also drive around about 7 pm and you can buy it then too."
Tips for camping with families
Kid-friendly water access: Many campgrounds offer safe swimming areas for children. "Camped in one of the spots that is right on the lake and could get in the water easily. Water is really clear," notes a visitor to Finley Point Unit. At Blue Bay, "The water shallow for a long distance of beautiful colorful rocks and perfect for swimming of all ages."
Playground availability: Some campgrounds feature dedicated play areas. "One of the best things about the park is the great playground for kids. Our kids loved it!" shares a visitor to Rollins RV Park.
Family-friendly activities: Various recreational options keep children engaged. "We enjoyed a very lazy day hanging out, reading and swimming," reports a Big Arm State Unit visitor. Another camper at Rollins RV Park noted, "The park is very clean and well maintained. They will pick up your trash daily. Very quiet."
Tips from RVers
Site selection: RV campers should carefully consider site dimensions and amenities. "Nice campground, a bit tight if you are a bigger rig but doable in the right spot, 2-3 bars of AT&T 5g, good enough to work, and quite all night," advises an RVer who stayed at Big Arm State Unit.
Hookup availability: Not all campgrounds offer full hookups. "Loop B has views through the trees of the lake. It's a special place," reports a West Shore Unit visitor. Another notes, "Electric and water is available in loop B. Loop A is primitive camping."
Seasonal considerations: "The sites at this resort are beautiful. They are large and in some cases the owners have added beautiful kitchens, sitting areas, fire pits, etc. In all cases there is really well cared for grass at each site and tons of room," shares a visitor to Polson Motorcoach and RV Resort.
