Presentations from our 2-day workshop on Stormwater Retrofitting held on April 29-30, 2013 in Fairfax, VA. This free workshop was aimed at practitioners with at least a basic understanding of stormwater management design and with an interest in learning more about the nuts and bolts of stormwater retrofitting. The focus of the training was on how to locate and prioritize retrofit opportunities in developed areas, through field investigations and concept drawings and covered retrofitting streets, existing stormwater basins, public lands, and other topics.