Background: Black adolescent girls possess a unique ability to inspire and enact change in their communities, yet are overlooked in discussions of leadership and empowerment. Coupled with deficit approaches to school-based physical activity programming, positioning Black girls as physical activity leaders is missing from practice. BLinG-HealthTM (Black Leadership in Girls’ Health) trained peer leaders in group fitness instruction instrumental in delivering group fitness sessions in an 8-week after-school physical activity pilot program. Methods and Analysis: This paper presents the qualitative data illustrating the program's impact on Black girls leading peers in a group fitness setting using general inductive narrative analysis based on group interviews, observations, reflection notes, and faculty leadership testimonials. Results: Participants exuded community, collaboration, and confidence. Peer leadership was effective but differed. Girls recognized the program's benefits and challenges while enjoying it. Conclusion: Black girls can lead physical activity initiatives when allowed to do so while building a community. Researchers and school and community activists should empower Black girls to lead physical activity programs to foster better health outcomes.