Depends on which end you mean. The beginning of the river, the top end, is called the headwaters. The other end is called the mouth, or delta.
mouth
bay
The starting point of a river is called a source. A smaller river that flows into a larger river is a tributary.
The point where the river starts off is called the
confluence
The start of a river is called the headwaters or source; the end of a river is called the mouth.When a river flows into another river, the 'mouth' of the river is called the confluence.
Francisco de Orellana explored the amazon river from it's starting point in the Peruvian Andes range to it's finishing point in the outfall of the Atlantic ocean.
Wade Barrett's finishing move is called the Wasteland
head watersIt is called the source.
Answer!-Usually the start of a river is called its source and the end of the river is called the mouth.
The mouth of the river is NOT called the start. The mouth is the end of a river. The headwaters refers to the starting point(s). The starting point is called the source.
The mouth of a river is the open space at the end of a river allowing passage. The mouth of a river, sometimes called a delta, is the point at which the river ends and the water flows into the sea.
River's flow
Answer 1The point at which a waterway [creek, river, etc.] enters another body of water [stream, lake, sea, ocean, etc.] is called the "river mouth."