The purpose of the current study was to develop, implement, and evaluate a season-long athlete leadership development program. Participants were 27 female varsity athletes who participated in four leadership workshops throughout the season, each 1 hr in duration. All of the participants completed inventories measuring leadership behaviors, cohesion, communication, athlete satisfaction, and peer motivational climate. Overall, the results showed significant differences in regards to leadership behaviors, athlete satisfaction, and peer motivational climate from pre- to postintervention. Further, follow-up focus groups were also conducted to assess the social validity of the leadership development program. These focus groups revealed important insight into program structure, influence of the program, leadership challenges, and suggestions for future improvements. These findings provide researchers, sport psychology consultants, and coaches with important information regarding the effectiveness of this athlete leadership development program in targeting human and social capital development.