Beaverhead River

Although originally formed at the confluence of the Red Rock River and Horse Prairie Creek, the Beaverhead River now begins its 69-mile-long journey at the outlet of Clark Canyon Reservoir, an irrigation storage facility constructed in 1964. It joins the Big Hole River at Twin Bridges, Montana, to form the Jefferson River. The river above Dillon is characterized by a tight channel meandering through densely covered willow banks. From Dillon, it flows through a broad open agricultural valley for 50 miles before reaching Twin Bridges. Its channel is restricted through a narrow canyon during part of its lower journey near Point of Rocks. The water in the Beaverhead River is comparatively cold, except in areas subject to dewatering, mainly located in the lower river. Fish cover primarily consists of submerged and overhanging bank vegetation, undercuts and long, deep pools.

Source: Montana Fish, Wildlife and Parks
Stream Flows
  • Lamar River nr Tower Ranger Station YNP
  • Flow (cfs): 3020
    Temperature (°F): 47.12
  • Yellowstone River near Livingston MT
  • Flow (cfs): 8650
    Temperature (°F): 32
  • Boulder River at Big Timber MT
  • Flow (cfs): 1960
  • Gallatin River near Gallatin Gateway MT
  • Flow (cfs): 2180
  • Stillwater River near Absarokee MT
  • Flow (cfs): 2260
    Temperature (°F): 32
  • Madison River at Kirby Ranch nr Cameron MT
  • Flow (cfs): 937
    Temperature (°F): 51.44
  • Madison River bl Ennis Lake nr McAllister MT
  • Flow (cfs): 1650
    Temperature (°F): 55.22
  • Missouri River bl Holter Dam nr Wolf Cr MT
  • Flow (cfs): 3820
    Temperature (°F): 49.82
  • Big Hole River near Melrose MT
  • Flow (cfs): 3040
    Temperature (°F): 53.6
  • Beaverhead River at Barretts MT
  • Flow (cfs): 310