The Claremont Heritage collection contains audiovisual material (moving images and audio) from the 1950s to the 2000s. The majority of the collection consists of oral hisotries with local residents and business-owners and recordings of live music and performances at Claremont's Padua Theatre.
The Mariposa Museum and History Center collection contains audiovisual material (movies, audio) and text from the 1850s through the early 2000s. The majority of the collection consists of newspapers and oral histories documenting subjects and topics such as mining, gold country, Yosemite and more.
The Petaluma Historic Library and Museum collection contains texts and audiovisual material (moving images, audio) and texts from the 1920s to 2010s. A majority of the collection consists of oral histories, interviews, and home movies concerning Petaluma Chicken Ranches, genealogy, the Argus Courier Newspaper, the Bojorques family and more. Other material includes texts such as oral transcripts and maps about the history of ranchos.