This chapter provides a system boundary discussion on surf sites, recognizing 'surf system boundaries' as more than beach and sea; they encompass numerous stakeholder interests and factors related to scope of 'whole' surf system as a sustainable and dynamic model. It reviews the knowledge of surf system boundaries and provides clarity in two sets of dimensions: the physical boundaries of surf sites and the resource stakeholders. Surf lifesaving clubs may form independently or under the auspices of local or regional governments, and can become grassroots stakeholder groups related to site integrity in terms of community, education, and safety. Bearing in mind the global surf tourism industry, surf resource sustainability is of growing significance to a wide range of stakeholders in different socioeconomic and cultural settings. Traditional resource custodians at surf sites include host communities, such as fishing villages on islands and in developing countries which may have long-standing access rights and interaction with coastal resources.