The Fox River has a total length of 200 miles. It has two distinct parts, the upper Fox River, and the lower Fox River. Eventually, the river continues through the Chain of Lakes in Illinois. This is Northeast of the town of McHenry, Illinois.
There is no "minimum length" to be classified as a river. However, width, and to a lesser extent depth do figure into whether or not it is called a river. If one can toss a rock across it, and it is...
From its source to its mouth. .............................................................................. If you didn't find that helpful, which most of you should not, the longest river is the...