July 21, 1935: Panorama photos taken by George Clisby.
October 16, 1943: Aircraft Warning Service Station "Yoke 6-4" was inactivated. The station utilized existing facilities owned by the Mt. Baker National Forest located on private land with an indefinite lease for fire control. Upon deactivation the Forest Service retained the use of the site. (Report of AWS Stations, May 1, 1944)