Large Boulder River Boulder

The Boulder River is a 77-mile tributary of the Jefferson River in southwestern Montana in the United States. It rises in the Rocky Mountains at the continental divide in the Beaverhead-Deerlodge National Forest in western Jefferson County. It flows east and southeast through the mountains past Boulder, then south to join the Jefferson near Car…
The Boulder River is a 77-mile tributary of the Jefferson River in southwestern Montana in the United States. It rises in the Rocky Mountains at the continental divide in the Beaverhead-Deerlodge National Forest in western Jefferson County. It flows east and southeast through the mountains past Boulder, then south to join the Jefferson near Cardwell.
  • Country: United States
  • State: Montana
  • County: Jefferson
  • Source: Continental Divide
  • Mouth: Jefferson River
  • Length: 77.3 mi (124.4 km)

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Data from: en.wikipedia.org