Presidio is a city in Presidio County, Texas, United States. It is situated on the Rio Grande River, on the opposite side of the U.S.–Mexico border from Ojinaga, Chihuahua. The name originates from Spanish and means "fortress". The population was 4,169 at the 2000 census, and had increased to 4,426 as of the 2010 US census.
Signpost outside the city of Presidio, Texas
The Rio Grande in the United States or the Río Bravo in Mexico is one of the principal rivers in the southwestern United States and in northern Mexico. The length of the Rio Grande is 1,896 miles (3,051 km), making it the 4th longest river in the United States and in North America by main stem. It originates in south-central Colorado, in the United States, and flows to the Gulf of Mexico. The Rio Grande drainage basin (watershed) has an area of 182,200 square miles (472,000 km2); however, the endorheic basins that are adjacent to and within the greater drainage basin of the Rio Grande increase the total drainage-basin area to 336,000 square miles (870,000 km2).
The Rio Grande at Big Bend National Park, on the Mexico–U.S. border
A riverine islet in the Rio Grande, seen from North Valley, New Mexico.
Rio Grande in west El Paso near the New Mexico state line
Rio Grande Gorge in Central New Mexico
