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 Ko‘olau Pilina Fund is specifically designed to support projects that are tailored to the needs and aspirations of Ko‘olau communities on Oʻahu, stretching from Kahuku to Makapuʻu. Now in its second year, the fund aims to build community resilience by adopting a participatory grantmaking approach. This involves a committee of Ko‘olau community members who vet proposals through an open, rolling application process, underscoring the fund's dedication to engaging directly with and empowering local communities.