Many college administrators and researchers assert that diversity interactions are critical for preparing young adults for a diverse society, but very little research has examined the long-term impact of these experiences. This study examines a longitudinal sample of college students (n = 416) who were followed into their mid-30s. Structural equation modeling analyses indicate that college engagement with racial/cultural diversity has a positive, indirect effect on personal growth, purpose in life, recognition of racism, and volunteer work 13 years after graduation. (Contains 2 tables and 2 figures.)