Investigators will conduct a longitudinal study using a cluster randomized stepped-wedge design to evaluate the intervention impact on ATOD and obesity prevention primary aims of: (1) substance use harm reduction and ATOD use and intentions to use; and (2) reduction in weight/body mass index (BMI) and increase in leisure-time physical activity/physical activity (LTPA/PA) and healthful food habits. Specifically, investigators will ask participants to participate in up to eight group sessions (based on a curriculum drawing on cultural teachings around health and behavioral change); attend up to three Motivational Interviewing individual sessions (to identify individual behavioral change goals); attend a two-day overnight culture and Trail prep camp; participate in camping and walking for up to 10 days on the Trail; and attend up to six post-walk meetings (to develop community health events). All five communities will also be asked to complete a baseline health assessment as well as three follow up assessments over the course of the year. Additionally, communities 2-5 will participate in three pre-intervention health assessments. This intervention integrates components of motivational interviewing, information-motivation-behavior, and a leadership development framework for adults. It targets individual behavioral change relative to ATOD and obesity prevention and simultaneously provides behavioral skills for health promotion leadership within their respective communities.The project addresses a critical public health issue among a group experiencing considerable health disparities and strengthens the research infrastructure in partnership with the Tribe. If efficacious, it has the potential for widespread dissemination and could be generalizable to other chronic co-occurring mental health and physical health conditions.