Rancho Roblar de la Miseria was a 16,887-acre (68.34 km2) Mexican land grant in present-day Sonoma County, California given in 1845 by Governor Pío Pico to Juan Nepomuceno Padilla.

In 1848, after he returned from Los Angeles, Padilla, who long had been blamed for the murders in Santa Rosa, was attacked by a group of former Bear Flaggers in a Sonoma hotel.

[3] In 1850 Padilla sold all of Rancho Roblar de la Miseria, except one half square league to be taken from the southeast corner, to Mariano Guadalupe Vallejo and his son-in-law, John B. Frisbee, and returned to Los Angeles.

[4] In 1850, soon after purchasing it, Vallejo and Frisbee sold Rancho Roblar de la Miseria to Daniel Wright, Erwin Hill, Edward E. Dunbar, Hardin Bigelow, Francis Salmon, John S. Ellis, and A.N.

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.