To promote education and advocacy through the culturally sensitive and environmentally sound use of sunlight and seawater for a sustainable future for Hawaii.

Founded as the Friends of NELHA in 2001, the KCS will continue to offer themed, weekday tours of Hawaii Ocean Science and Technology (HOST) Park’s research and cutting-edge industries for both visitors and Hawai‘i students.


We offer NELHA/HOST Park Tours on Mondays, Tuesdays, Wednesdays & Fridays at 10 AM, except holidays.

And now an all new offering, the Guided Coastal Natural History Tour on Wednesdays at 8 AM, except holidays.

BOOK here for either NOW!

If a particular date does not open for booking, it is because it is unavailable at this time.

For further questions call 808-329-8073 or email kcs@kcshi.org.


Keahole Center for Sustainability is located at the Natural Energy Laboratory of Hawaii Authority’s  HOST Park (Hawaii Ocean Science & Technology Park). HOST Park serves as a business incubator, research facility, and center for economic development–offering the opportunity for organizations using sea water, sunshine, and ingenuity to perform research, engage in conservation and education activities, and produce sustainable commercial products.


So much to see and do especially in the science and food areas. From the cold seawater, the scientists and engineers have created interesting developments fro seahorses to pharmaceuticals. Spend a day here.

Visiting NELHA was literally the high point of our trip to the Big Island. These research groups are doing fascinating and admirable work and are showing us the way to the future in sustainable energy, agriculture, and aquaculture. The tour made us wish that we were young again and able to choose our career paths here. -Bj N

We loved this. The tour was incredibly interesting. NELHA is doing some amazing work. Visiting the charter school was very cool and made us want to go back to school (one of that type of course..) Definitely a very cool activity to do in Kona. -Smoll1