 Filming lasted from late 1972 to early 1973.Dylan's first session for the "Pat Garrett and Billy the Kid" soundtrack was on January 20, 1973 at CBS Discos Studios in Mexico City.The only song from that day that was included on the album was "Billy 7"; also recorded were multiple other takes of "Billy", and the outtakes "Under Turkey", "Billy Surrenders", "And He's Killed Me Too", "Goodbye Holly" and "Pecos Blues".