The headwaters.
The place where the river begins is called a source.
The "source", or its "headwaters"
The start of a river is called the "source" or "headwaters". The end of the river is called the "mouth" or "outlet".
A place where a river rises is called the source or headwaters of the river. This is typically the point where the river begins, either from a spring, glacier, or other water source.
A river that begins with I is the Illinois River in Illinois USA.
The Indus River is the major river of Pakistan that begins with an I.
Syr Dar'ya is the river that begins at the pamirs
what river begins in the arkansas mountians
That would be called the Chang Jiang River, which is also called the Yangzi River.
The Arve River is a tributary of the Rhone River. It begins with the letter A.
No famous river begins in Cairo, Egypt. The only river at Cairo is the Nile river. It begins from sources in central Africa and Ethiopia.
The Scioto River begins at and ends at