[sammyg2]

"Marty, your father's been in the same place for the last twelve years. Oak Park Cemetery." —Lorraine


Oak Park Cemetery was a cemetery in Hill Valley. In 1985-A, it was located near industry. In this timeline, it was the burial place of George McFly, shot in 1973 by Biff Tannen. Marty and Doc both knew the location of the cemetery, suggesting that it also existed in the regular timeline of 1985, as a cemetery.

Behind the scenes
◾ It is possible that Oak Park was a location that lent its name to the cemetery.
◾ The Oak Park Cemetery scene was filmed at the Ultramar refinery in Wilmington, California.
A small "duck pond" park, on company property, was dressed with tombstones in order to make the cemetery, and the refinery can be seen in the background.
The duck pond and park were funded and maintained by the refinery's employees and were home to many ducks, geese, rabbits and turtles.

I worked there at that time. It was actually filmed in the day but cameras were filtered to make it look like night.