The Salmon River comprises two forks, the North Fork and the South Fork, which join at the hamlet of Forks of Salmon, California to form the 19.6-mile (31.5 km) long mainstem Salmon River.
Two forks form the Salmon River: the North Fork and the South Fork. These join in the hamlet of Forks of Salmon, California to produce a total length of 19.6 miles (31.5 km) for the mainstem Salmon River.