Group mentoring is an increasingly popular intervention, but is still under-studied. This article reports findings from a qualitative study of the Young Women Leaders Program (YWLP), a combined group and one-on-one mentoring program for early adolescent girls. Protégés (n = 113) were interviewed post-program about changes they made as a result of the program and mechanisms of those changes. Girls reported making changes in four major domains as a result of YWLP: (a) Academics (e.g., study habits), (b) Relational Development (e.g., trusting people), (c) Self-Regulation (e.g., thinking before acting), and (d) Self-Understanding (e.g., being yourself). Relational development and self-understanding were the most frequently reported types of change. Protégés reported mentors as contributing to changes in academics more often than the mentoring group. They reported the mentoring group as the change mechanism more often than mentors for relational development. Protégés reported the mentors and mentoring groups about equally as the mechanisms of change for self-regulation and self-understanding. The findings support prior research on group mentoring and suggest that social and relational skills are a developmental domain in which group-based mentoring programs for early adolescent girls may be particularly effective at intervening.