Just in case you're camping in this magnificent, but little visited National Monument (amazing density of Saguaro and Organ Pipe cactus) and decide you want to take in the local South of the Border color, El Serape is a VERY local taco joint which is worthy of a Bordain visit.
We spent three days hiking and camping in this out-of-this-world spot over the New Year, which is only a 5 to 6-hour drive from San Diego. There is really nothing anywhere in the vicinity worth checking out as far as dining is concerned, but we thought we'd go for some authentic Mexican instead of camp food one evening. We traveled south about 10 miles from the Park to the US border town of Lukeville, or Gringo Pass as the locals call it. There was literally only one cafe, a place to buy Mexican auto insurance and a supermarket so we asked a local where to get the best food in Sonoyta, the town on the opposite side of the border. She said to go to El Serape which serves only two items: Carne Asada tacos and Adobado tacos. This is authentic "street" food - no atmosphere, no heat, no windows, no dessert. But it is authentic, satisfying and a real slice of Mexican people's food.