Interpersonal relationships are central to adolescent well-being. The current research investigates interpersonal goal setting among a general sample of adolescents following a growth mindset intervention. This study qualitatively explores what interpersonal goals adolescents set, outcomes they aim to achieve, obstacles they perceive, and actions to overcome the obstacles during the mental contrasting and the implementation intentions goal setting task (MCII). Participants included 217 grade 9 and 12 students (63.13% White/European). One content and three thematic analyses were conducted on adolescent responses to the MCII. Participants largely set goals related to improving the quantity and quality of their friendships. The ultimate ideal outcome of goal achievement was an improved emotional state. Obstacles were both internal (e.g., characteristics) or external (e.g., others) in nature. Actions identified to overcome the obstacle were either active or passive with passive approaches exhibiting lack of congruence with intervention content. Findings contribute to the empirical understanding of adolescent interpersonal goal setting and provide researchers/practitioners a rich resource of youth experiences to draw on when considering goal setting interventions. A better understanding of adolescents' lived experiences setting goals also stands to benefit those who seek to aid youth in improving well-being.