The Lower Rio Grande Valley (LRGV) of southern Texas is located on the United States-Mexico borderland and represents a 240-kilometer (150-mile) linear stretch that ends at the Gulf of Mexico. The LRGV represents a unique transition between temperate a
Leslie,, David M. Jr. cleslie@usgs.gov. An international borderland of concern: Conservation of biodiversity in the Lower Rio Grande Valley. 2016-01-01.