Mexican border formalities, San Luis and Los Algodones
— If you search the internet for the immigration procedures a U.S. citizen needs to follow when driving to Mexico, you’ll find many different answers. Most of them are outdated. Some of them apply in certain cases and not in others. Few of them are authoritative. One common answer is that you don’t need a so-called “tourist card” if you’re traveling less than 25 kilometers from the border and staying less than 72 hours in Mexico.