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 .
Mississippi River System
The Missouri River is a long stream that originates in southwest Montana and flows southeasterly for 2,522 miles; passing through six states before finally entering the Mississippi River at St. Louis. The Missouri River is the longest river on the North American continent. The Missouri River was one of the main routes for the watershed expansion of the United States during the 19th century.