This InfoBrief discusses challenges faced by youth and young adults with mental health needs during their transition to adulthood and describes strategies used by youth service professionals to avoid age-related transition cliffs and prevent service interruptions during this critical stage of development. This InfoBrief is based on a rich body of research about transition-age youth with mental health needs published in four separate reports in the last two years, including two produced by the National Collaborative on Workforce & Disability for Youth (NCWD-Youth).