 For 75 years a ranching family owned the property that now comprises Oracle State Park.The family gave the property to the Defenders of Wildlife organization in 1976, and ten years later, the land was donated to the state of Arizona to create a preserve.The most common plants in Oracle State Park are prickly pear and cholla cactus, scrub oak, mesquite, many wildflowers, and the occasional piñon and juniper.