Pio Pico, the last governor of Mexican California before the American takeover in 1846, built an adobe home on what is now a four-acre park. Pico was one of California’s most remarkable historical figures. He witnessed and helped shape nearly a century of California history. His ancestry includes a mixture of ethnicities, including Spanish, African, Indian, and Italian. The park site was once the headquarters of Pico’s 8,894-acre ranch.