The Rio Grande forms a significant portion of the border between the United States and Mexico.

The Rio Grande, known as Río Bravo in Mexico, flows from the San Juan Mountains in Colorado, through New Mexico, and along the Texas-Mexico border before emptying into the Gulf of Mexico. Stretching over 1,900 miles, it serves as a natural boundary between Texas and several Mexican states, including Chihuahua, Coahuila, Nuevo León, and Tamaulipas. The river is vital for agriculture, water supply, and biodiversity in the region. Additionally, the Rio Grande holds cultural and historical significance, shaping the lives and traditions of communities on both sides of the border.