Community college (CC) students who intend to transfer to baccalaureate programs often encounter complex curricular requirements. To navigate them, students activate their social and academic networks in a variety of ways. In this case study of a cohort of CC students in an urban system, we trace the the importance of those we call keystone agents — people in network positions which bridge campus ecologies. We find that keystone agents are important source of information and other supports. We illustrate how keystone agents share information across student networks and how their beliefs about curriculum navigation hold sway over students’ course-taking behaviors, even when these beliefs run counter to the design of guided pathways programs and other local campus-based interventions. Keystone agents’ information sharing aims to create organizational pathways that are intended to reduce friction within CC course sequences, but they also have a series of unintended consequences when students choose to transfer. We offer implications for the development of transfer support programs and interventions, curricular policy-making, and the design of campus environments.