American Indian adolescents experience higher rates of suicide and psychological distress than the overall U.S. adolescent population, and research suggests that these disparities are related to higher rates of violence and trauma exposure. Despite elevated risk, there is limited empirical information to guide culturally appropriate treatment of trauma and related symptoms. We report a pilot study of an adaptation to the Cognitive Behavioral Intervention for Trauma in Schools in a sample of 24 American Indian adolescents. Participants experienced significant decreases in anxiety and posttraumatic stress disorder symptoms, and avoidant coping strategies, as well as a marginally significant decrease in depression symptoms. Improvements in anxiety and depression were maintained 6 months postintervention; improvements in posttraumatic stress disorder and avoidant coping strategies were not. (Contains 3 tables and 2 figures.)