The foundation awards grants to close achievement and preparation gaps in public education in Hawaii, restore nearshore marine ecosystems, and strengthen Windward Oahu communities.

Founder Harold Kainalu Long Castle was the owner of Kaneohe Ranch.

The Castle Medical Center was named after Harold K.L.

The foundation provides grants from $500 to $5,000 to Windward youth group activities that include community service.

[1] Investments include grants for the Bishop Museum,[2] Teach for America[3] and stem cell research.