This brief summarizes how a Youth At-Risk of Homelessness (YARH) grantee in Colorado developed an intervention model to prevent and address homelessness among transition-age youth. The authors describe the Pathways to Success model as an intensive, youth-driven case management approach designed for youth ages 14 to 21 who are currently in foster care, preparing to age out, or have already aged out and become homeless. Furthermore, the model uses a coach-like engagement method adapted from the Co-Active Life Coaching model originally designed for adult and college student populations. The authors discuss key considerations and lessons learned to guide other states and local jurisdictions as they develop transition-age youth interventions. (author abstract modified)