Fourteen yarding settings on eight different sites on the Queen Charlotte Islands were monitored to measure productivity and evaluate logging system. Effectiveness, to document yarding disturbance, and to determine how disturbance may contribute to landslide initiation. Twenty-three landslides occurred on or near the study areas, of which three occurred in adjacent control areas of no logging, and four occurred prior to yarding and were probably associated with discharge of road drainage. Of the sixteen failures that occurred within the yarded areas, fourteen had direct evidence of yarding disturbance in their initiation zones. Nine of the failures (four road associated, three non-logging associated, and two yarding associated were over 200m2 in area6