This paper is intended to provide a summary of our current knowledge concerning this population in terms of epidemiology, effective interventions, and program models. It will also serve as a technical assistance tool for those who are providing, or preparing to provide, services to these vulnerable vouth.The paper was informed, in pait. by the rich discussion generated at the CMHS-sponsored workshop. ''Adolescents with Serious Emotional Disturbance: Achieving Transitions/Preventing Homelessness'' held in Arlington, VA in April. 1995. Workshop participants included researchers, clinicians, program administrators, family members, consumers, and representatives of national youth advocacy organizations and local, state, and federal governments. They came together to: gain a clearer understanding of the barriers to successful transition to adult mental health systems for adolescents with serious emotional disturbance, identify needed systems changes to eliminate these barriers, and make recommendations to CMHS for next steps in addressing these issues.Because multiple perspectives are needed to address the problems faced by transitional youth. the authors have attempted to bring together a broad range of information. I hope this paper opens a meaningful dialogue between different disciplines, and among policy makers, service providers, advocates, youth, and their families. The result of this effoit will be much needed attention to a vulnerable group of youth.