This chapter introduces theory and methods to evaluate the landscape of collaborations among policy stakeholders, particularly in terms of network segregation-a common feature of networks that is a barrier to integrative ties. Using Southeast Florida, U.S.A., as a case, this chapter walks through an empirical test of the proposition that network integration enables policy learning. Overall, this advances the theory of networks and policy learning that helps to inform the practical strategies of organizations seeking to help regional stakeholders better address shared environmental risks.