Sonoma State Historic Park is located in Sonoma Valley.
The park consists of six sites: the Mission San Francisco Solano, the Sonoma Barracks (sometimes called the Presidio of Sonoma), the Blue Wing Inn, La Casa Grande, Lachryma Montis, and the Toscano Hotel.
The park was founded in 1909 and originally contained only the Mission San Francisco Solano. The State of California has, over the years, added additional historic locations to the Park. Many of the added venues were associated with the life of Mariano Guadalupe Vallejo who was central to secularization of the Mission; the founding and improvement of the Mexican pueblo of Sonoma; and, the development of Sonoma as an American city.