This was a multilevel, multi-component systems based childhood obesity prevention trial implemented in multiple levels of the Baltimore Food System to improve access, demand, affordability and consumption of healthier foods among low-income urban families. Our research partnered with stakeholders and community organizations at different levels, e.g., the policy, wholesaler, retailer, adult caregiver, and individual child levels. Twenty eight low-income, predominantly African American geographic zones were identified and randomized to receive the program or a delayed program. Within each intervention zone we worked with at least 3 small food stores and prepared food sources to increase access to healthy foods through wholesaler promotions, display point of purchase promotional materials, and provided nutrition and food preparation education targeting youth and their caregivers in recreation centers and social media, respectively. We worked with local policymakers to institutionalize and sustain these changes. We also conducted a pilot study with two local urban farms and neighboring corner store markets aimed to introduce local produce as part of the retail food store component of the intervention.