Event tourism is accompanied by social, economic and environmental benefits and costs. The assessment of this form of tourism has however largely focused on the social and economic perspectives, while environmental assessments have been bound to a destination-based approach. The application of the Ecological Footprint methodology allows for these environmental assessment boundaries to be extended. This case study applies the footprint methodology to the Australian Association for Environmental Education (AAEE) Biennial Conference held in Adelaide in 2004. The results of the case study provide important insight into the planning and delivery of future events for the Association and event managers. (Contains 2 tables, 10 figures and 3 endnotes.)