This building, erected in 1844-46 by Francisco Solano Alviso, was the first adobe house to be built in the Pleasanton Valley. It was originally called Alisal-The Sycamores. Following the Battle of Sunol Canyon, General John C. Frémont withdrew to this building, which became his headquarters for several days.

Marker can be reached from Foothill Rd ¾ mile south of Old Foothill Rd..

Courtesy hmdb.org

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