Craig conducts research on the ecology and environmental history of Southwestern landscapes, and the responses of Western mountain ecosystems and forests globally to climate change; he also provides technical support in the areas of ecosystem management and restoration to diverse land management agencies in the region. He is a core principal investigator of the USGS Western Mountain Initiative, an integration of research programs that study global change in mountain ecosystems across the western United States (see WesternMountains.org), with extensive international collaborations. Recent and ongoing research activities, involving many colleagues and collaborators, include: integrated understanding of climate-induced tree mortality and forest die-off, including determination of global patterns and trends; development of ecological and fire histories in the southwest U.S.; ecological effects of recent fires on southwestern landscapes; ecological restoration of southwestern forests and woodlands; and developing long-term ecological monitoring networks across landscape gradients in the Jemez Mountains.