Rancho Huerhuero was a 15,685-acre (63.47 km2) Mexican land grant in present-day San Luis Obispo County, California of one square league given in 1842 by Governor Juan Alvarado and another three square leagues given in 1846 by Governor Pío Pico to José Mariano Bonilla.
[1] The grant extended along Huerhuero Creek and encompassed present day Creston southeast of Paso Robles.
His managers suffered repeatedly from Indian raids, and he sold Rancho Huerhuero to Francis Branch in 1847.
With the cession of California to the United States following the Mexican-American War, the 1848 Treaty of Guadalupe Hidalgo provided that the land grants would be honored.
In the mid-1880s, Flint and Bixby sold Rancho Huerhuero to Amos Adams, Thomas Ambrose, Calvin J. Cressy, and J.V.