Diaries documenting the westward treks of 45 men and four women during the period of the California Gold Rush and the westward migration of Mormonism are presented in this site. Although most of these travelers took either the California or Mormon trails, a few diaries provide accounts describing life on trails to Oregon and Montana.

The diaries are complemented by 82 photographs and illustrations in addition to 43 maps, including an interactive map displaying trails, cities, rivers, and landmarks. There are seven published guides, two essays on the Mormon and California trails, brief biographies of most of the diarists, and a list of suggested readings. This is an excellent collection of materials that documents 49 individual perspectives on a movement that encompassed an estimated 500,000 people.

These 11 exhibits address the history of California and San Francisco. Topics include the Gold Rush of 1849; earthquakes of 1906 and 1989; the history of the city's fire department; construction of the Golden Gate and Bay Bridges; and the internment of Japanese Americans during World War II. These exhibits provide timelines and links to more than 200 primary documents and images, including newspaper articles, diary entries, oral histories, photographs, political cartoons, and engravings. Two exhibits are hyperlinked chronologies pertaining to San Francisco during World War II and the rock music scene in the city from 1965 to 1969.

Documents can be accessed according to subject, with more than 25 documents listed on the Chinese-American community, fairs and expositions, and labor issues. The site also contains more than 150 biographies of prominent San Franciscans.