Montana
Cancellation alerts

Big Arm Unit - Flathead Lake State Park

We watch every site at Big Arm Unit - Flathead Lake State Park 24/7, then email you the moment a cancellation opens up.

100% of weekends booked at top sites·Peak Jul–Sep·46 sites
Set up an alert for Big Arm Unit - Flathead Lake State Park

Pick your dates, pick the sites you want, we do the watching.

Park favorites

The 10 most popular campsites at Big Arm Unit - Flathead Lake State Park

Booked on virtually every weekend during peak season (Jul–Sep). They reserve months ahead and rebook within minutes when cancelled — set up an alert and we'll email you the moment one opens.

Site Ponderosa

Top pick
Tied for most booked · 10 of 46 sites
DAY USE AREA · Sleeps 40

Site G001

Top pick
Tied for most booked · 10 of 46 sites
Group Camps · Sleeps 35 · Waterfront

Site A002

Top pick
Tied for most booked · 10 of 46 sites
Campsite · Sleeps 8 · Waterfront

Site A004

Top pick
Tied for most booked · 10 of 46 sites
Campsite · Sleeps 8 · Waterfront

Site A012

Top pick
Tied for most booked · 10 of 46 sites
Campsite · Sleeps 8 · Waterfront

Site A013

Top pick
Tied for most booked · 10 of 46 sites
Campsite · Sleeps 8 · Waterfront

Site B020

Top pick
Tied for most booked · 10 of 46 sites
Campsite · Sleeps 8 · Waterfront

Site B021

Top pick
Tied for most booked · 10 of 46 sites
Campsite · Sleeps 8 · Waterfront

Site B022

Top pick
Tied for most booked · 10 of 46 sites
Campsite · Sleeps 8 · Waterfront

Site B004

Top pick
Tied for most booked · 10 of 46 sites
Campsite Electric · Sleeps 8 · Waterfront

These sites rebook within minutes of being cancelled. Set an alert at Big Arm Unit - Flathead Lake State Park and we’ll email you the moment one opens up.

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About this park

The park is located on the southwest shore of Flathead Lake and offers spectacular views of the Mission Mountains. It is a popular launch spot to Wild Horse Island. Many of the 40 campsites are situated along the shoreline. The park also has 3 yurts, showers and flush toilets. Swimming, sunbathing, boating, fishing and hiking on the nature trail are some of the popular activities. This park and the southern end of Flathead Lake are located on the Flathead Indian Reservation, so you will need a Confederated Salish and Kootenai Tribe fishing license to enjoy the excellent fishing here.