This collection is a family photo album from between 1922-1925. The photographs are of a girls' trip out to Yellowstone, where they lived and worked for a summer. There are also a couple of newspaper clippings and decals from Yellowstone in the book. The photographs show what it was like to work and live in Yellowstone during the early 20th century. Some interesting pictures are of bears eating out of the dump that was there until the 1960s and pictures of old bus parts at Mammoth.

The collection consists of photographs of the Winninger family and the YU Ranch on the Greybull River during the years 1920 to 1940. The Winninger family was made up of Joseph Winninger, Mabel Buell Winninger and their four kids. John Joseph "Jack" Winninger was the oldest, born in 1926, and the donor of the collection with his wife JoAnn Winninger. The YU Ranch was primarily a sheep ranch, and in the late 30s also became a cattle ranch.