Discover the most magical spots to pitch your tent or park your rig on your next Flathead Lake State Park - Big Arm Unit adventure.
Discover the serene beauty of Big Arm on Flathead Lake.
It would take big arms, indeed, to swim across Flathead Lake, the 28 by 15 mile beast of a pond in western Montana. But Flathead Lake is no Dead Sea (in fact it’s much bigger than that little speck of an ocean). This place is teeming with fish, and there’s no better spot to go to town trout huntin’ than Flathead Lake State Park's Big Arm area, located right by the long pebble beach of Big Arm Bay. Looking for something a little more epic than a (completely absolutely perfect) day of fishing and sunbathing? Scuba dive into the deep or watch the wild horses and bald eagles at Wild Horse Island, a quick hop from Big Arm. But Big Arm isn’t all surf with no turf! A 2.5 mile trail through juniper trees and ponderosa pines leads to a view of the Mission Mountains so stunning we dare you not to snap a picture.
The best time to visit Big Arm is from April through October when the campground is open and the weather is ideal for outdoor activities. Mid-May to mid-September offers full amenities, including water access and shower facilities. For a quieter visit, consider the shoulder seasons when the crowds have thinned.