I have to say that the history of Rancho San Francisco is definitely a lot more interesting than the location of this historical landmark. The history of Rancho San Francisco tells the history of the City of Santa Clarita. Most of the information listed below was obtained from various Wikapedia pages.
Mission San Fernando Rey de Espana, established in 1797, was the 17th of 21 Spanish missions established in Alta California, the land controlled by Spain and later Mexico before it became a territory of the United States.
The mission needed more land for crops and livestock so they looked north to the Santa Clarita Valley. They created a "mission ranch" (or as the plaque states, a "granary" which is a place to store grain). They names the mission ranch Mission Rancho San Francisco. In the process they had to relocate the Tataviam Indians who were living on the lands at the time. They moved them to the mission and used them for labor.
The missions were later taken over by the Mexican government. In 1839, Lt Del Valle was the person in charge of inventorying the property of Mission San Fernando Rey de Espana. Instead of returning the land back to the Tataviam Indians, the then Mexican Governor, Juan B. Alvarado, deeded it to his friend Del Valle. Del Valle later died and his son, Ygnacio, took control over the land.
Del Valle's wife, Jacoba Feliz, had an uncle named Francisco Lopez. He was the first person to find gold in California at the Oak of the Golden Dream, located in Placerita Canyon. This started a mini gold rush with the much larger California Gold Rush taking place several years later.
Jacoba later sued for control of Rancho San Francisco. The land later was split between the Del Valle's son and his wife. The land was later sold to a petroleum company and then to Henry Newhall. Henry Newhall granted the land to Southern Pacific Railroad and which led to the town of Newhall and later Saugus.
The plaque inscription reads:
NO. 556 RANCHO SAN FRANCISCO - Approximately one-half mile south of the point was the adobe headquarters of Rancho San Francisco, originally built about 1804 as a granary of Mission San Fernando. The rancho was granted to Antonio de Valle in 1839. Here, in January 1850, William Lewis Manly and John Rogers obtained supplies and animals to rescue their comrades in a California-bound gold-seeking emigrant party that was stranded and starving in Death Valley, some 250 miles to the northeast.
Location: SW corner of 'The Old Road' and Henry Mayo Drive, 0.2 mi S of I-5 and State Hwy 126 interchange, Valencia read more