PurposeA case example describing a teen-led council convened by an integrated health system. We seek to share the approach and impact of this work with the broader health services and promotion field.Approach or DesignA stakeholder-informed formative evaluation.SettingIntegrated health system in Upper Midwest.ParticipantsProgram staff, a program alumna, external program partners, subject matter experts, and current council members.MethodThis evaluation was informed by a literature review, data previously collected by the program, key informant conversations, and a participatory data collection activity with current council members. Rapid qualitative analysis was used to describe council framework and stakeholder-identified outcomes.ResultsInformed by best practices in authentic youth engagement and youth-adult partnership, this council has had a positive impact on participants, the convening health system, and the community served by the health system, in service of adolescent health and well-being.ConclusionThis formative evaluation demonstrates how youth are able to take on a leadership role and have a positive impact on adolescent care delivery and health promotion.