Rio Grande

Rio Grande, also Rio Grande del Norte, and Rio Bravo del Norte, a large river of North America, rises in the San Juan Mountains in south-western Colorado, and flows generally south-eastward into the Gulf of Mexico, forming on its way the entire boundary between Texas and Mexico. Its length is about 1800 miles; it is for the most part a shallow stream, but small steam-boats can ascend for nearly 500 miles. Its chief affluent is the Rio Pecos.—See also, for other Rio Grandes, PARANÁ and SENEGAMBIA.