The John and Alan Blum Collection contains photographs and ephemera related to the life of the Blum brothers, highlighting both their personal lives and their work at the Northwest Air Service, which John founded in 1929. The personal items focus on outdoor activities with the Blum family, such as camping, skiing, sailing, and—of course—flying. Professional items include several hundred photos of planes, pilots whom the Blums knew, and facilities where they carried out their work.
Focused primarily on events and activities in the Pacific Northwest and Alaska, the collection contains several items related to landmark moments in Northwest aviation history: the fatal flight of Wiley Post and Will Rogers, the crash landing of a Northwest Air Service plane on the roof of the Bon Marche building in Seattle, and the activities at the newly founded Sand Point Naval Air Station. Also of interest are images of nature and outdoor activities in the Pacific Northwest in the 1920s and 1930s and photographs of the Blum's participation in the Citizen's Military Training Camp at Fort Lewis, Washington.