Rancho Agua Caliente (Alameda County)

Rancho Agua Caliente was a 9,564-acre (38.70 km2) Mexican land grant in present-day Alameda County, California granted in 1836 by Governor Nicolás Gutiérrez to Antonio Suñol and confirmed in 1839 by Governor Juan Alvarado to Fulgencio Higuera.

In 1836 Fulgencio Higuera was granted the two square league Rancho Agua Caliente, formerly Mission San José land.

With the cession of California to the United States following the Mexican–American War, the 1848 Treaty of Guadalupe Hidalgo provided that the land grants would be honored.

An attorney, Abram Harris, purchased the southern portion of this land in 1858 and established what briefly became known as Harrisburg.

In 1850, Clement Columbet bought 640 acres (2.6 km2), and developed a resort and one of the state’s first wineries.