The Fourth Fire Behavior and Fuels Conference was held in Raleigh, North Carolina, USA, February 18-22, 2013. The theme for this conference was At The Crossroads: Looking Toward the Future in a Changing Environment. Joint sponsorship of the conference was by the International Association of Wildland Fire (IAWF) and the International Association for Fire Safety Science (IAFSS). A second session of the conference was held in St. Petersburg, Russia, July 1-4, 2013 in conjunction with National Research Tomsk State University and Worchester Polytechnic Institute. The joint conferences proceedings contain 71 written contributions.