 the boise river is a u.s. geological survey. national hydrography dataset high-resolution flowline data. , accessed may 3, 2011 tributary of the snake river in the northwestern united states. it drains a rugged portion of the sawtooth range in southwestern idaho northeast of boise, as well as part of the western snake river plain. the watershed encompasses approximately  of highly diverse habitats, including alpine canyons, forest, rangeland, agricultural lands, and urban areas. ==description== the boise river rises in three separate forks in the sawtooth range at elevations exceeding , and is formed by the confluence of its north and middle forks. the north fork,  long, rises in the sawtooth wilderness area, along the boise-elmore county line,  northeast of boise. it flows generally southwest through the remote
Landforms_of_Ada_County,_Idaho Landforms_of_Boise_County,_Idaho Landforms_of_Camas_County,_Idaho Landforms_of_Canyon_County,_Idaho Landforms_of_Elmore_County,_Idaho Rivers_of_Idaho Tributaries_of_the_Snake_River