There are plenty of taquerias to choose from in San Mateo, but this is one of the late night shops. They are located in the heart of downtown and there is always a line here. They had to expand the place a couple of times just to keep up with the demand, and competition hasn't slowed them down. The burritos here are really huge! A also notice that a lot of Mexicans eat here, so they are really authentic too. It's got a big menu, and fresh carrot juice too.