The Tree-Ring Lab at Portland State University was established in 1999 and share approximately 900 square feet of space dedicatedto the Physical Geography Laboratory. The lab includes space for tree-ring analyses and sample preparation and is equipped with a computerized tree-ring measuring system, tools for sample preparation, and field equipment for research in dendroecology and vegetation sampling. The lab represents the collaborative efforts of the Geography Department, College of Liberal Arts and Sciences, PSU Facilities Management, and Willamette University.