The length of the Nile River is 7,088 km or 4,405 miles from its source in Nyungwe National Park of Rwanda to the mouth in Egypt. SOURCE: S. Liu, P. Lu, D. Liu, P. Jin, W. Wang, Pinpointing the...
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...