This study is about organizing major sporting events. Sporting events’ numerous positive outcomes for the hosting region has resulted in a growing number and size of sporting events globally. The aim of this study was therefore to provide further knowledge about how organizations in major sport events practically and strategically operate and how processes related to organization and leadership can contribute to the success of the event. The study focuses the context of a Swedish national multi-sport event hosted and held by three different cities, three different years. Questions about networking, cooperation with different stakeholders, project strategy and Knowledge Management were examined. The data was collected through means of qualitative interviews of different project leaders and archival materials. The results show the complexity of the event organization mostly related to its temporariness and complicated stakeholder network. The results also show that Knowledge Management is a crucial factor in this kind of organization. This indicates overall that it is of great importance that the leader of the organization is able to coordinate and balance the many needs and desires of each stakeholder.