City and county planners across the US will have a new toolkit to better manage development encroachment into rangelands. The 'Rangelands on the Edge' project, paid for by Forest Service range managers, led by the Rocky Mountain Research Station, and conducted in partnership with Colorado State University, is pending publication. This report shows how historic rangeland extent has been altered and modified by human use and predicts future trends in rangeland fragmentation and loss. The report shows the current loss of rangeland in the western U.S. due to expanded development is 40,000 acres per year. Municipalities can use this information to enhance decisions about where to best place development and invest in open space conservation. This information will also serve as the base for the rangeland section of the next Resources Planning Act report.