From the Guidebook:
The expedition of Don Gaspar
de Portolá from Mexico passed this way en route
to Monterey to begin the Spanish colonization of California.
With Captain Don Fernando Rivera y Moncada, Lieutenant
Don Pedro Fages, Sergeant José Francisco Ortega,
and Fathers Juan Crespí and Francisco Gómez,
Portolá and his party camped near this spot on
August 3, 1769.