What is the Rio Grande?

It is a river that makes part of the border of the U.S. and Mexico.

A river, about 3,033 km (1,885 mi) long, rising in southwest Colorado and flowing generally south through central New Mexico to southwest Texas, where it turns southeast and forms the U.S.-Mexican border for the rest of its course. It empties into the Gulf of Mexico near Brownsville, Texas, and Matamoros, Mexico.

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