With their unrivaled ability to reach youth, school-based services and primary care clinics (PCC) are ideal hubs to provide mental health healthcare, social services, and prevention to students and families. Using Participatory Design and Community Partnered Participatory Research (CPPR), UCLA and UCR psychiatry research centers with Los Angeles Trust for Children’s Health aim to: (1) Use community participatory informatics to co-design a mental health digital tool called Connected for Wellness, to support mental health navigation, linking youth to a range of mental health services, app-based evidence-based prevention resources, and other school, clinic, community, and social supports; (2) Integrate mental health self-assessments and predictive algorithms in Connected for Wellness to individualize app resources, optimize engagement and recommendations for addressing mental health and social needs; (3) Using a stepped wedge design, test the implementation of the app supported by mental health navigation models (peer navigators, family navigators) for improving connections, access to prevention resources, screening, mental health services and social supports, for youth and families. This project will be initiated with youth 13-22 years old and family and community members across 10 Los Angeles County Schools and 10 Riverside County primary care clinics. Mobile technology approaches are gaining empirical support and hold great potential for strengthening mental health navigator models. Incorporating scalable digital health tools, to aid in the mental health supports and navigation process, connecting to care, and multi-level communication, will help ensure youth are receiving optimal care that navigators, providers and other relevant systems can measure. A successful outcome of the project is a CPPR developed mobile application intervention implementable in school-based and primary care services, for improving mental health services access and prevention resources for youth.