Filming came to the property as early as 1935 with MGM's Tarzan Escapes when the studio built the treehouse near Crag's Road and Brent Mountain.
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The studio later purchased part of the Ronald Reagan Ranch and the Hunter Homestead. It was on the latter property that the house used in Mr. Blandings Builds His Dream House was built--a fully functional house, still standing and in use.
The property was the home to the movie and television versions of Mash as well as Planet of the Apes.
While some sets were built and removed, long standing sets included a ranch set, a Mexican Village, and a Fort, now all gone.
In 1974, the State of California purchased the ranch and opened it to the public in 1976.