The Boulder River is a tributary of the Yellowstone River, approximately 60 mi long, in south central Montana in the United States. It is one of two rivers named the Boulder River in Montana. It rises in the Gallatin National Forest in the Absaroka Range in southern Park County. It flows north through mountainous canyons, a cataract under a natural bridge, an…
The Boulder River is a tributary of the Yellowstone River, approximately 60 mi long, in south central Montana in the United States. It is one of two rivers named the Boulder River in Montana. It rises in the Gallatin National Forest in the Absaroka Range in southern Park County. It flows north through mountainous canyons, a cataract under a natural bridge, and northwest in a widening valley past McLeod. It joins the Yellowstone at Big Timber. The landscape of the Boulder River and river valley has merited the filming of two movies: A River Runs Through It and The Horse Whisperer.
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