The border touches four U.S. states: California, Arizona, New Mexico, and Texas. On the Mexican side, it touches six states: Baja California, Sonora, Chihuahua, Coahuila, Nuevo León, and Tamaulipas. That’s a lot of handshakes.
The busiest crossing is San Ysidro, near San Diego. Over 100,000 people walk or drive through every day. It’s like a mall food court but with guards and declarations. The wait times? Sometimes two hours. Bring snacks.
United States Mexico Border Map U.S. Canada Mexico Cross Border
Let’s Talk Rivers
The Rio Grande is the star. But it’s not a giant river. In dry months, you can wade across it. Kids in border towns have been known to swim from Mexico to Texas for a school field trip. No kidding—there’s an actual “international swim club” in the town of Boquillas del Carmen.
On the western end, though, the border hits the Colorado River delta. That’s a mucky, marshy mess. It’s so weird that the border actually ignores the river near Yuma, Arizona, and just runs a straight line through farmland. Why? Because 19th-century mapmakers were lazy. True story.
