Housed in the former City Hall built in 1914, the Museum On Main Street has rotating local, regional and California history exhibits. The completely refurbished museum offers a lecture series, photo and document collections, history library, gift shop, education tours and talks, walking tours, research and special events.
The Society was incorporated in 1964 with a non-profit status.
Historical items from Tri-Valley families representing the agricultural and business background of the area.
Photo and document library. Local and regional history library.
Docent program, lectures, special events, exhibitions.