Pío Pico State Historic Park is the site of El Ranchito, also known as the Pío Pico Adobe or Pío Pico Mansion, the final home of Pío Pico, the last Governor of Alta California under Mexican rule and a pivotal figure in early California history. Located in Whittier, California, at 6003 Pioneer Blvd. near Whittier Blvd. and Interstate 605, it is California Historical Landmark No. 127, listed as "Casa de Governor Pío Pico". Just west of the park is the San Gabriel River. Across the river is the city that bears his name—Pico Rivera. The park consists of the adobe and about three acres of surrounding land.

Harriet Russell Strong was an American social activist, inventor, businesswoman, conservationist, and leading figure of the early woman's movement. She has been inducted into the National Women's Hall of Fame and the National Inventors Hall of Fame. Her pioneering innovations in water storage and flood control enabled the construction of the Hoover dam and the All-American Canal.