About the United States – Mexico Border
The international border between the United States and Mexico runs from Imperial Beach, California, and Tijuana, Baja California in the west, to Matamoros, Tamaulipas, and Brownsville, Texas in the east, and traverses a variety of terrains, ranging from major urban areas to inhospitable deserts. The border's total length is 3,169 km (1,969 mi) according to figures given by the International Boundary and Water Commission. It is the most frequently crossed international border in the world, with approximately three hundred fifty million (350,000,000) crossings per year.