The Rio Grande river is part of such border.
US-Mexico border. If you mean the body of water that defines a large stretch of such border, it is the Rio Grande River.
The Gulf of Mexico is Mexico's major body of water on its south eastern border.
Gulf of mexico
gulf of mexico.
Gulf of Mexico.
The Gulf of Mexico
Golf of Mexico
The caribbean sea
the large body of water that all of the pacific states border is the pacific ocean,the alantic ocean, and the gulf of mexico
the large body of water that all of the pacific states border is the Pacific Ocean,the alantic ocean, and the Gulf of Mexico
It is the Rio Grande River (or Rio Bravo del Norte, as known in Mexico), which also works as natural border between the United States and Mexico.
Golf of Mexico