Over the first two weeks of February, the park witnessed a dramatic increase in the number of illegal border crossings. In an operation conducted on February 11th, rangers apprehended 89 illegal entrants in a single incident. Upon contact, members of the group dispersed over a large area. With the assistance of aircraft to shuttle rangers around and corral them, rangers were able to apprehend the entire group. Rangers hiked the illegal aliens out to the nearest road and filled two waiting US Border Patrol buses.