This chapter discusses how the complexity of long-term vision and short-term delivery common to event and festival organisations poses several knowledge management (KM) challenges and needs to be recognised as a unique environment for KM to be practised. It provides an overview/history of KM and discusses different KM approaches that have been applied to event and festival studies, such as documenting knowledge in databases or checklists. Newer insights in the KM literature are then explored, with a particular emphasis on the relational and practice-based dimension of KM. A summary of international event case studies investigating these issues in an event and festival context is provided, and different research methods applied to these topics are critically discussed. The chapter concludes with a proposed research agenda to further explore KM in events, including a list of topics and research approaches that will contribute to the professionalisation of the field in the long run.