It starts at the "source" or "head/headwaters"--usually a lake or spring.
The Mississpi River starts in Mississippi.
At the souce of the river
No river in India starts with the letter U.
The Nile River Starts at Lake Victoria.
No river in India starts with the letter X.
No river in Australia starts with the letter X.
No river in the United States starts with the letter X.
No river in Hungary starts with the letter E.
No river in Britain starts with X. If you need a river starting with X, the Xingu River is a major river in Brazil and the Xi River is in China.
it starts from melting of glacier
It is the point where the river starts.
Ganges River.