A collaborative effort led by the Rocky Mountain Research Station, has produced a report outlining the impact of changing climate on forest distribution, particularly that of Douglas-fir. Douglas-fir is the top valued forest product tree in the West, and understanding its ecological and evolutionary potential is necessary to understand its future commercial value. The research was conducted in response to a recognized need to understand how climate change will affect the species' distribution, ability to migrate, and ability to adapt and survive where it is. The study is unprecedented in size with thousands of samples collected from throughout the Intermountain West, all the way from Canada to Mexico. The study results are critical to land managers who must develop adaptation strategies and proactive management decisions and to the public who values forests for water resources, wildlife, and timber production. This research was made possible by successful collaboration with scientists from the Pacific Southwest Research Station, Pacific Northwest Research Station, Forest Inventory and Analysis, Oregon State University, and University of Washington Climate Impacts Group.