“Watersheds are complex, dynamic, and nested ecological systems that span across multiple jurisdictions. The complexity of watershed pollution requires adaptive and responsive strategies that incorporate government intervention along with community stakeholder engagement. This study explores the motivational determinants that drive local cross-sector watershed collaboration. Cross-sector collaboration offers local watershed stakeholders a holistic approach to address community watershed issues. … This research explores the social processes and the motivations that drive organizations in different industry sectors to engage in local watershed collaboration. … A single case study research design is utilized to answer the research questions. Data sources included: (1) interviews, (2) official government and organizational web sites and various media sources, and (3) field observations and memos. A total of twenty-nine organizations participated in the study. The composition of the organizations included 10 private sector organizations, 10 public sector organizations and 9 nonprofit sector organizations. … The results of the study identify ten motivational determinants that drive local cross-sector watershed collaboration. … In addition, the results of the study identify variations in the level of prevalence in the motivations of organizations from the public, private and nonprofit sectors that collaborate with LRN. Finally, the results from the study identify three types of organizational motivation orientations in local cross-sector watershed collaboration.”