The Beaverhead River in southwestern Montana is one of the premier brown trout fisheries in the state, flowing 80 miles from Clark Canyon Dam to its confluence with the Big Hole River at Twin Bridges to form the Jefferson River. This tailwater fishery is renowned for producing large brown trout with impressive consistency. The river begins at an elevation of 5,450 feet at the dam outlet and drops to 4,600 feet at its mouth, flowing through arid hills in its upper section before entering a broad valley. Its narrow, winding character with countless bends makes it challenging to navigate but rewarding to fish. The banks are heavily lined with willows and cottonwood trees, creating both cover for fish and casting challenges for anglers. With high fish densities and trophy potential, particularly in the upper sections, the Beaverhead attracts significant angling pressure despite its technical fishing demands.