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Natural Bridge Falls: Natural Bridge State Monument Main Boulder Valley Professional Review and Guide
"Natural Bridge State Monument is located in the Main Boulder River Valley 25 miles south of the town of Big Timber. The area is named for a limestone arch that once spanned the Boulder River. The 25-foot natural arch collapsed in July 1 988. Natural Bridge Falls, a 1 05-foot cataract on the river, surges through the Madison limestone chasm. The waterfall changes throughout the seasons. In the early spring, the surging cataract drops more than 1 00 feet over the limestone precipice in the river-carved gorge. In late spring, two smaller waterfalls are visible under the main falls. During the summer, the water disappears into a riverbed hole and tumbles out of the lower caverns at the base of the waterfall, revealing the bedrock."
--Robert Stone, Day Hikes in The Beartooth Mountains (The Globe Pequot Press).
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