Beaverhead River Professional Review and Guide
"The Beaverhead River is among Montana’s premiere big-fish fisheries, supporting a phenomenal population of large trout in its upper reaches. Each year, the Beaverhead rewards skilled anglers with scores of browns and rainbow over 3 pounds and a few weighing over 10 pounds.
Beginning 20 miles south of Dillon at the outlet of Clark Canyon Reservoir, the Beaverhead River meanders for about 50 air miles to its junction with the Big Hole River north of Twin Bridges. The upper river, the 15-mile stretch between Barretts Diversion and Clark Canyon Dam, winds through a narrow valley with picturesque rock outcrops. The lower river runs through a large broad valley ringed by a series of small mountain ranges. Key species: Rainbow, brown, cutthroat, grayling, and whitefish."