Although the number of youth in out-of-home placements has dropped dramatically over the past decade, racial and ethnic disparities in youth incarceration have increased. As a result, the lasting consequences of juvenile justice system involvement disproportionately affect youth of color. Some reform efforts, therefore, emphasize racial and ethnic equity and inclusion (REEI) in addition to reducing general justice system involvement. In this brief, we describe findings from a developmental evaluation of the Annie E. Casey Foundation’s expansion of the Juvenile Detention Alternatives Initiative^® to the deep end of the juvenile justice system. The findings build on those presented in Keeping Youth Out of the Deep End of the Justice System: A Developmental Evaluation Overview of the Annie E. Casey Foundation’s Deep-End Reform, which provides an overview of the evaluation. In this brief, we discuss why REEI is a central component of deep-end reform, present an overview of the types of REEI activities sites have pursued, and reflect on how sites’ REEI work might inform similar efforts in other jurisdictions.