Natural Bridge Falls Picnic Area

"The Natural Bridge Falls on the Boulder River is within the Gallatin National Forest. The river is constrained by a deep chasm before dropping over a 100-foot tall limestone cliff face. During times of low water, the river travels underground and spews out of the limestone wall through a network of dissolved limestone channels and caverns. A natural arch once was located over the Boulder River but collapsed in 1988. The easy 1.4-mile hiking trail is well maintained and offers several viewing and interpretive areas of the river and falls. A new footbridge allows you to cross the Bolder River. The trailhead is off of Boulder Road (298) south of McLeod in the Gallatin National Forest."