California Historical Landmarks in Contra Costa County
California Historical Landmark 509
Joaquín Moraga Adobe
24 Adobe Lane
In 1835 Don Joaquín Moraga, with his cousin Don Juan Bernal, was awarded this grant which they called Rancho Laguna de los Palos Colorados - the adobe was completed in 1841. Don Joaquín was the grandson of José Joaquín Moraga, founder and first commandante of the Presidio of San Francisco.
Citation from California Office of Historic Preservation
We were unable to locate a commemorative plaque. Here's a list of other California Historical Landmarks which had no bear flag plaque when we visited them.
The Joaquín Moraga Adobe is also National Register Listing 72000223.