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The Lower Rio Grande Valley (Spanish: Valle del Río Grande), commonly known as the Rio Grande Valley or locally as the Valley or RGV, is a region spanning the border of Texas and Mexico located in a floodplain of the Rio Grande near its mouth. [1] The region includes the southernmost tip of South Texas and a portion of northern Tamaulipas, Mexico.
Map of the Middle Rio Grande Basin showing a section of the Rio Grande Valley (tan) before entering the Socorro Basin to the south. The entire Rio Grande Valley in New Mexico follows the Rio Grande Rift, a structural rift caused by the westward extension of the continental basement of the Western United States during the past 35 million years.
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Rare first state of Giovan Battista Nicolosi's four sheet map of North America, the first printed map to accurately depict the course of the Rio Grande (named Rio Escondido) flowing into the Gulf of Mexico. In 1519, a Spanish naval expedition along the northeastern coast of Mexico charted the mouths of several rivers including the Rio Grande.
The Rio Grande Valley area played a significant role in the Mexican War of Independence, the Texas Revolution, the Mexican–American War, and the American Civil War, with many historical battle sites around the area. General Robert E. Lee resided at Fort Ringold (Rio Grande City) during this time as a colonel.
Terrell County, which borders both the Pecos River and the Rio Grande, is the least-populated county in the Trans-Pecos region. According to the United States Census of 2000 , Terrell County had a total population of 984 residents occupying a land area of 2,358 sq mi (6,107 km 2 ), resulting in a population density less than 0.5 persons per ...
North America's major continental divide is the Great Divide, which runs north and south down through Rocky Mountains. The major watersheds draining to the include the Mississippi/Missouri and Rio Grande draining into the Gulf of Mexico (part of the Atlantic Ocean), and the St. Lawrence draining into the Atlantic.
Rio Grande–Mimbres subregion: The drainage within the United states of the Rio Grande Basin from Elephant Butte Reservoir to the junction of the Mexico, New Mexico, and Texas international boundary, and including the Jornada Draw, Mimbres River, and Other closed basins west of the Rio Grande. New Mexico and Texas. 11,100 sq mi (29,000 km 2 ...