This session will guide attendees as trail managers in the identification, control, and prevention of the occurrence of invasive species. While there are a myriad of negative impacts from invasive species, the deleterious effects on trail spaces and outdoor recreation are not always recognized. This presentation attempts to posit a “Know What You Have/Control What You’ve Got/Keep Out What You Don’t Want” attitude towards managing trail spaces. The focus of the presentation will be on terrestrial invasive vegetation, but aquatics and animals will also be touched on.