There's the Red River of the northern United States and southern Canada, and there's the Red River of New Zealand, on the North Island.

The longest river in the United States is the Mississippi River.

Rajang River (Malaysia), Ravan River (Russia), Red River (China, Vietnam), Red River (United States), Rhine River (Switzerland, Liechtenstein, Germany, Austria), Rhone River (Switzerland, France), Richmond River (Australia), Rio Grande River (United States) and Ruza River (Russia) are rivers. They begin with the letter R.

There are two rivers that are called Red River in the United States. One of them flows between the states of Minnesota and North Dakota. The other Red River flows through the states of Texas, Oklahoma, Arkansas, and Louisiana.

The longest river in the United States is the Mississippi River.