Built in 1857 by Vicenta Carrillo, a prominent early Californian woman rancher, the Warner-Carrillo Ranch House served as the Butterfield Stage Stop and was California's first regular overland stage connection with St. Louis. Located within a huge expanse of open land, the site possesses a historic setting that has remained virtually unchanged since the mid-19th century. With its multilayered history, the adobe ranch house tells the story of the emigrant trail, the overland stage, and the prominent ranching history of the area.