Boise River

The Boise River is a 102-mile-long (164 km) 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 4,100 square miles (11,000 km) of highly diverse habitats, including alpine canyons, forest, rangeland, agricultural lands, and urban areas. The Boise River rises in three separate forks in the Sawtooth Range at elevations exceeding 10,000 feet (3,048 m), and is formed by the confluence of its North and Middle forks. The North Fork, 50 miles (80 km) long, rises in the Sawtooth Wilderness Area, along the Boise-Elmore county line, 60 miles (100 km)...