The Harold K.L. Castle Foundation focuses on enhancing the life of communities in Hawai'i. While specific mission details are not provided, their support for the Ko‘olau Pilina Fund indicates a commitment to building resilience and supporting community-driven initiatives within the Ko‘olau region of Oʻahu.
The grant aims to make measurable improvements in Hawaii's nearshore oceans, promote systemic change by enhancing governance, and foster a collaborative community-based management model for scaled impact. The grant shifted to five specific tactics to improve marine health and management: reducing land-based pollution, supporting Hawaii's capacity to manage resources, improving marine management infrastructure, building a community-based co-management model, and designating new areas and regulations for sustainable resource use. These efforts are directed towards substantial increases in the effectively managed marine acreage and Hawaii’s capacity for ocean management, focusing on collaborative science, better management, and improved enforcement.