a northward flowing river running through the Bitterroot Valley, from the confluence of its West and East forks near Conner in southern Ravalli County to its confluence with the Clark Fork River near Missoula in Missoula County, in western Montana.

A mountain range, a subrange of the Rocky Mountains, that runs along the border of Montana and Idaho in the northwestern United States.

The Northern and Central Bitterroot Range, collectively the Bitterroot Mountains (Salish: čkʷlkʷqin), is the largest portion of the Bitterroot Range, part of the Rocky Mountains and Idaho Batholith, located in the panhandle of Idaho and westernmost Montana in the northwestern United States.

The (or Flathead, Salish, Séliš) a Salish-speaking group of Native Americans, and one of three tribes of the Confederated Salish and Kootenai Tribes of the Flathead Nation in Montana.

located in southwestern Montana, along the Bitterroot River between the Bitterroot Range and Sapphire Mountains, in the Northwestern United States.