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 .
American Fork River
The city of American Fork is named after this river.
The description "American" in the river's name is to distinguish it from the Spanish Fork River that also originates in the Wasatch Range; alternatively, it could have been named after the American Fur Company.