sentences:  Most of the east side of the Sawtooth Range is drained by the main stem of the Salmon River and the west side by the South Fork Payette River.Small portions of the northern and southern ends of the range are in the watersheds of the Middle Fork Salmon River and Boise River, respectively.There are 40 trails totaling nearly in the Sawtooth Wilderness that can be used for day hiking, backpacking, and horseback riding and accessed from 23 trailheads.