This collection contains images of wildlife, landscapes, and geothermal features, primarily those associated with Yellowstone National Park. Many images were housed in protective sleeves in 3-ring binders. The binders have been removed but the contents of each binder are housed together; each binder's contents are designated by a letter. Some slides are housed in wooden or metal cases containing the original trays, and the majority of the materials have notes or captions indicating the subject, date, and/or type of camera used. Each individual slide has a corner with a dot or asterisk, apparently to indicate the orientation of the slide for viewing.

Also contains an number of friends and family photographs which include Condon's wife Lorna and children, Wilson and Marianne.