"Cade's County" TV series: "The Mustangers" (premiered Nov. 14, 1971)
The episode would have been shot during summer 1971. The Upper Iverson landscape shown in "The Mustangers" is a combination of dried grass and the still-black charred trunks of trees and bushes that survived the fire. This footage captures a moment in the regeneration process of the native foliage: The grass had grown back during the winter and spring following the fire, and then had subsequently dried out as another hot Chatsworth summer set in.
Laguna Fire, 1970
The most famous of the fall 1970 wildfires became known as the Laguna Fire, although while it was raging it was also called either the Kitchen Creek Fire or the Boulder Oaks Fire. The above map shows the area it destroyed, mainly in eastern San Diego County. Said to be either the second largest or third largest fire in California history at the time, depending on which report you read, the Laguna Fire broke out on Sept. 26, 1970, as a result of downed power lines caused by Santa Ana winds, and went on to burn 175,425 acres, killing eight civilians and destroying 382 homes.
Topo map: Clampitt Fire, 1970
The Newhall-Malibu Fires of 1970 break down in various ways according to various reports, but documentation exists for something called the Clampitt Fire, as seen in the topo map above. The Clampitt Fire is said to have destroyed between 105,000 and 115,000 acres and is blamed for the loss of four lives and 86 structures. The map isn't as dramatic or as easy to follow as the map of the Laguna Fire, but a close look at it reveals that the Clampitt Fire would have cut a swath through a number of well-known movie sites. Besides hitting parts of the Lower Iverson, in the top right corner of the map, the fire would have swept through historic filming locations including Spahn Ranch, just south of Iverson; Bell Ranch, in the area designated "Box Canyon" on the map; Burro Flats, near where "Rocketdyne" is indicated; and Ahmanson Ranch, which is pinpointed on the map. It looks to me as though this particular branch of the fires missed both Corriganville and the Upper Iverson, although those areas were hit by other destructive fires around the same time.