INTRODUCTION: Traditional research on adverse childhood experiences (ACEs) often retrospectively assesses ACEs and treats ACEs as a composite score, potentially overlooking the distinct effects of specific ACE patterns and their critical timing, which may influence health outcomes differently. It is crucial to explore variations in the patterns and timing of ACE exposure across racial/ethnic groups to improve ACE screening and intervention strategies. METHODS: In 2023, this study analyzed data of the Future of Families and Child Wellbeing Study (FFCWS) initially conducted in 1998. FFCWS sampled children from three racial/ethnic groups (N RESULTS: The analysis revealed a 9-class model applicable to these 3 racial/ethnic youth groups. Classes combining material hardship with other ACEs and those featuring adolescent abuse were more prevalent among Black and Latine youth. This study also identified a class displaying a temporal pattern, such as early maternal intimate partner violence followed by late parental separation. CONCLUSIONS: This study highlights the necessity of analyzing diverse class structures and the timing of ACEs across different racial/ethnic groups. Understanding these nuances is vital for developing culturally tailored interventions to reduce health disparities.