Built in 1857, the Warner-Carrillo Ranch House served as the Butterfield Stage Stop and was California's first regular overland stage connection with St. Louis. 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.

The historic setting has changed very little from the time of the great western migration and presents a rare opportunity to experience the past.

The adobe maintains a high degree of integrity including a great deal of its historic fabric including the original fireplace mantle, much woodwork and vigas (ceiling beams).

The ranch house plays a leading role in the history of the American West. It represents Mexican and American culture contact during the Mexican Republic; the Frontier period of the westward migration; and the Gold Rush and the cattle ranching industry from 19th century Californio to 20th century to today.