Subseries consists of a collection of documents covering the inception and development of Apex Mountain Resort near Penticton, BC. Includes form letters to Apex members, reports, and some financial statements. Also included is a collection of promotional brochures from the 1970s – 1990s.

An additional sequence of photographs related to Apex Mountain can also be found in series 1.3-1 (Historical Photograph Collection) at the item range 1.3-1/00766 – 1.3-1/00813.