Back to the Future was primarily filmed in various locations across California, with key sites including:

• The Hill Valley Courthouse Square was a set on the backlot of Universal Studios in Universal City, California.
• Hill Valley High School scenes were filmed at Whittier High School in Whittier, California.
• The McFly family house in 1985 was located at 9303 Roslyndale Avenue, Arleta, California.
• The 1955 McFly residence was at 1711 Bushnell Avenue, South Pasadena, California.
• The Twin Pines/Lone Pine Mall scenes were shot at Puente Hills Mall in City of Industry, California.
• Doc Brown's house exterior shots were filmed at the Gamble House in Pasadena, California, with some interiors at the Robert Blacker House in Pasadena.
• The train scenes for Part III were filmed at Railtown 1897 State Historic Park near Jamestown, California.
• The 1885 Hill Valley scenes from Part III were filmed at Red Hills Ranch near Sonora, California.
• Monument Valley, Arizona, was used for some desert scenes in Part III.

Additional locations include Santa Clarita, Los Angeles, Griffith Park, and various other spots in Southern California