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Missouri River

America's longest river gets it's start in Montana near the town of Three Forks. Right from the start, the Missouri is running big and wide on it's long journey across North America to join the Mississippi over 2300 miles away. The swift currents of late spring and summer make it a popular river for floaters. The land the Missouri slides by has substantially the same appearance as when it was explored by the Lewis and Clark expedition over two centuries ago.

As flyfishermen, we tend to think of the Missouri in terms of a phenomenal rainbow trout fishery from where the river leaves Holter Lake and downstream to the town of Cascade. In this 40 mile stretch of river, anglers are treated to a multitude of fishing possibilities. The MO supports a staggering 4000 trout per mile population with a majority of the fish being rainbows. The average size of these fish pushes 16 inches with fish of 20 inches not uncommon. The river has excellent aquatic bug life making for consistent hatch activity throughout the summer and fall months. This in turn translates to excellent dry fly fishing opportunities for both the rainbow and brown trout.


Stream Flows
  • Lamar River nr Tower Ranger Station YNP
  • Flow (cfs): 801
    Temperature (°F): 64.76
  • Yellowstone River near Livingston MT
  • Flow (cfs): 7200
    Temperature (°F): 66.38
  • Boulder River at Big Timber MT
  • Flow (cfs): 816
  • Gallatin River near Gallatin Gateway MT
  • Flow (cfs): 950
  • Stillwater River near Absarokee MT
  • Flow (cfs): 2230
    Temperature (°F): 64.58
  • Madison River at Kirby Ranch nr Cameron MT
  • Flow (cfs): 1100
    Temperature (°F): 59.18
  • Madison River bl Ennis Lake nr McAllister MT
  • Flow (cfs): 1720
    Temperature (°F): 72.14
  • Missouri River bl Holter Dam nr Wolf Cr MT
  • Flow (cfs): 4480
    Temperature (°F): 64.4
  • Big Hole River near Melrose MT
  • Flow (cfs): 750
    Temperature (°F): 66.2
  • Beaverhead River at Barretts MT
  • Flow (cfs): 743