Rancho San Mateo was a Mexican land grant in present day San Mateo County, California given in 1846 by Governor Pio Pico to Cayetano Arenas.
Rancho San Mateo was a Mexican land grant on the San Francisco Peninsula, in present day San Mateo County, California. It was given in 1846 by Governor Pio Pico to Cayetano Arenas.