Going south on Hwy 93, the Bitterroot Mountains rise to the west, where swift mountain streams have carved numerous dramatic canyons. Many of these have good trails that afford excellent birding such as Bass and Larry creeks (20 miles south of Missoula) and Kootenai Creek (23 miles from Missoula).
American Dippers are common along these streams. The canyons are good for Winter Wren and Rock Wren; if lucky, you might hear the beautifully cascading song of the Canyon Wren. The canyon walls provide excellent nesting sites for Peregrine and Prairie falcons, Golden Eagles, Turkey Vultures, and White-throated Swifts. Western Screech-Owls and Pileated Woodpeckers nest in the cottonwood trees along the streams. Larry Creek has an especially nice riparian zone where you can find Red-naped Sapsuckers, Red-eyed Vireos, and warblers.