The Del Mar Drive-In was actually located in Solana Beach on Valley Avenue & Via de la Valle. I remember all the entertainment venues were in Solana. In addition to the Drive-In there was sit down movie theater, a bowling alley, a skating rink and golf. The Lomas Santa Fe golf courses are still here, all the others are long gone. We used to climb up the hill on off Highland where you could watch the movie on the Drive-In screen. Just no sound. The Drive-In opened around 1953 and closed in 1983.