US-Mexican Border

The international border between Mexico and the United States runs from San Diego, California, and Tijuana, Baja California, in the west to Matamoros, Tamaulipas, and Brownsville, Texas, in the east. It traverses a variety of terrains, ranging from major urban areas to inhospitable deserts. From the border crossing at El Paso, Texas, and Ciudad Juárez, Chihuahua, to the east, it follows the course of the Rio Grande (Río Bravo del Norte) to the Gulf of Mexico; from the same binational conurbation westward to the Pacific Ocean, it crosses vast tracts of the Sonoran and Chihuahuan Deserts, the Colorado River Delta, and the northernmost tip of the Baja California Peninsula.

The border's total length is 1,951 miles (3,141 km), according to figures given by the IBWC. It is the most frequently crossed international border in the world, with some 350 million people crossing (legally) every year.