Big Hole River

The Big Hole River is a tributary of the Jefferson River, approximately 153 miles (246 km) long, in Beaverhead County, in southwestern Montana, United States. It is the last habitat in the contiguous United States for native fluvial Arctic grayling and is a historically popular destination for fly fishing, especially for trout.

Big Hole River
Big Hole River near Twin Bridges, Montana
Map of the Big Hole River watershed
Location of mouth
Native nameSk͏ʷumcné Sewɫk͏ʷs
Location
CountryUnited States
StateMontana
Physical characteristics
Source 
  locationSkinner Lake, Bitterroot Range, Montana, Beaverhead
  coordinates45°10′22″N 113°30′42″W
  elevation7,372 ft (2,247 m)
MouthJefferson River
  location
Twin Bridges, Montana
  coordinates
45°34′04″N 112°20′21″W
  elevation
4,610 ft (1,410 m)
Length153 mi (246 km)
Basin size2,800 sq mi (7,300 km2)
Discharge 
  locationnear Twin Bridges
  average1,250 cu ft/s (35 m3/s)
Basin features
Tributaries 
  rightWise River
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