Rancho Santa Ana y Quién Sabe was a 48,823-acre (197.58 km2) Mexican land grant in present day San Benito County, California given in 1839 by Governor Juan B. Alvarado to Manuel Larios and Juan M. Anzar.[1] The grant, east of present day Hollister, consisted of the one square league Rancho Santa Ana in the Santa Ana Creek valley on the north, and the six square league Rancho Quién Sabe in the watershed of the upper Quién Sabe Creek in the Quién Sabe Valley on the south.[2][3]