On 18th August 2004, heavy rainfall in the afternoon (approximately 25-30 mm h-1) triggered a series of landslides and floods across Stirlingshire (from Killin in the north to Callendar in the south). A detailed reconstruction of the floods and resulting debris flows which occurred in Glen Ogle and Glen Ample will enable the current landslide and flood hazard to be better characterised. Such a reconstruction, when combined with modelling the susceptibility of these slopes to further failure, will assist in recalibrating these environmental hazards for given projected climate change.