North Fork American River
The North Fork American River is the longest branch of the American River in Northern California. It is long from its source at the crest of the Sierra Nevada, near Lake Tahoe, to its mouth at Folsom Lake northeast of Sacramento. Prior to the construction of Folsom Dam the river was about longer making for a total length of .
Hoquiam River
The East, West, and Middle Forks all originate north of Grays Harbor and flow generally south. The East Fork Hoquiam River is the longest, at long. It joins the West Fork to form the main stem Hoquiam River near Hoquiam and Aberdeen. The West Fork and Middle Fork are both long. The West Fork is paralleled by U.S. Route 101. It joins the East Fork form the main stem Hoquiam River. The Middle Fork is a tributary of the West Fork.