This exploratory study investigates the early stages of coordinated networks established to strengthen and promote citywide summer program opportunities. The four cities we selected only serve as examples of how this could work; they might not be representative of networks around the country. Although we focus on the early phases of these coordinated efforts (i.e., up until summer 2016) in Boston, Dallas, Pittsburgh, and Washington, D.C., members of these networks had been addressing summer programming in various ways for several years. The following research questions guided our exploration: 1. How have cities developed collaborative efforts to strengthen and promote summer opportunities? 2. What progress have these efforts made? 3. What challenges have these networks faced? 4. What lessons have emerged from this work that might benefit other cities? (author abstract)