Contains photographs of Betty Zane Grey Grosso with her first husband, Bob Carney, and consists predominantly of pictures of her as a teenager and with horses. It also contains photographs of her in the ground of the Altadena, California home, her daughter, Michele, and grandchild dating from 1920 to 1980.

Contains two manuscripts of stories with Western themes collected by Zane Grey dating from approximately 1930 to 1950.

Contains programs, cards, and other materials documenting Zane Grey's death, dating from 1939 to 1941.

Contains property records, agreements, and other material related to property owned by the Grey family in California dating from 1950 to 1981.

Contains records for the Grey properties at Lackawaxen, Pennsylvania and Altadena, California including deeds, correspondence, tax records, and other agreements dating from 1900 to 1981.

Contains correspondence and articles concerning Loren Grey dating from 1918 to 1973.

Contains photographs of Lillian Wilhelm Smith and her artwork, predominantly from after Zane Grey's death. It contains photographs of decorative designs and sketches of Native American motifs, the library walls of the Grey home that she decorated, and prints of paintings made by her dating from approximately 1925 to 1970.

Contains photograph documenting Romer Grey's family and life, mostly after the death of his father in 1939. It contains photographs of Romer Grey from when he was a child, with his wife, Octave "Bea" Grey, and with his son, Romer Grey III. It also documents his role in the Flying Sphynx Ranch, Zane Grey Trails, and his relationship with Margaret A. Ingram dating from approximately 1915 to 1980.

Contain photographs documenting Zane and Lina Elise Grey's family life. It contains portraits and casual photographs of each family member, including Zane Grey's children, grandchildren, siblings, and mother. It also contains photographs of family gatherings outside the Grey homes in Altadena and Catalina, California dating from approximately 1890 to 1970.

Contains correspondence between Zane Grey and family members, editors, and fans. Most of the material deals with family concerns and Grey's writings dating from approximately 1900 to 1960.