Besides the historically important Mission architecture, The Old Mill's grounds are landscaped with native California plants. The Old Mill was bequeathed to the City of San Marino 35 years ago, and since 1996 has been operated by the Old Mill Foundation, a nonprofit public benefit corporation. The City funds the utilities and participates in building and grounds maintenance as needed. The Old Mill Foundation, a non-profit, charitable organization, was founded to raise funds and operate the Old Mill facility. The San Marino Historical Society is also involved in planning and participating in the future use and preservation of the Old Mill.
Admission is free.
From the 210 Freeway the gallery may be located by driving south on Lake Avenue in Pasadena, which turns into Oak Knoll Avenue, and then turning left on Old Mill Road. For motorists in San Marino going west on Huntington Drive, turn right on Old Mill Road and proceed two blocks to the building, and for east-bound motorists on Huntington Drive, turn left on Oak Knoll Avenue and then right on the third street, which is Old Mill Road, then drive one long block to the building. Exhibits are rotated quarterly. The Club is also in negotiations for a second Los Angeles area gallery. The California Art Club shall also organize public exhibitions to promote and preserve California's history and heritage.