The USDA Forest Service Experimental Forests and Ranges (EFRs) are the largest and longest-lived ecological research network in the United States. Consisting of 81 sites such as Hubbard Brook, H.J. Andrews, and Coweeta Experimental Forests, the network encompasses a variety of forest and grassland ecosystems across the United States, ranging from boreal forest to tropical forest to peat bog deciduous forest to semi-arid chaparral to dry desert. Records from many of these sites date back to the 1930s or earlier. This session will examine the legacy of EFR data collection, four of the network data themes—climate change, water, silviculture, and fire-and how these data are being used in an integrated manner to understand ecosystem change, evaluate extreme or unexpected events, and determine long-term outcomes of management activities. The EFR network makes robust and defensible data publicly available, supporting natural resource management for multiple values on public and private lands. Applications include quantifying trajectories of climate change impacts, evaluating carbon sequestration outcomes of forest management, developing growth and yield models, and identifying wildlife conservation priorities, among others. The session will explore opportunities to examine network-level data to address research questions at multiple scales, and learn how data have been used to provide critical information on regional issues such as wildfire and water in the West, acid deposition in the Northeast, timber in the Southeast, and carbon storage in the Northcentral and Northeast. Talks will also address the Forest Service’s efforts to make EFR data more discoverable, accessible and usable.