Pio Pico State Historic Park, Historic adobe house in Whittier, United States.

Pío Pico State Historic Park centers on El Ranchito, the Pío Pico Adobe, a single-story adobe house at 6003 Pioneer Boulevard in Whittier, about three acres of grounds beside the San Gabriel River. Pico rebuilt it after the 1882 flood, giving the Californio adobe American-style elements; the state restored the house from 2000 and the historic landscape from 2002.

Pío Pico began acquiring Rancho Paso de Bartolo in 1848 and built an adobe home here in 1853. Floods in 1867 and 1882 damaged it, and the structure was redone in its current form, mixing American elements into Californio design. In 1892 Bernard Cohn evicted Pico, who had conveyed the deed while thinking it was a loan. The site became a state historic park in 1927.

The house is California Historical Landmark No. 127, listed as "Casa de Governor Pío Pico". Its second adobe, rebuilt after the floods, is described on the marker as a compromise between Mexican and American cultures. Pico, who could not read or write English, lived here while active in the development of American California.

The park is open daily and you can walk the grounds at your own pace or join a guided tour to learn more about the site. There are signs and information displays throughout, and the pathways are easy to follow for most visitors.

The 1883 deed Pío Pico signed for lawyer Bernard Cohn, believing it a loan, cost him the ranch; he could not read English. Evicted in 1892, he died a pauper two years later. The park holds about three acres of the original Rancho Paso de Bartolo.