About Ferngrottokauai.org

This independent guide helps you plan a trip up the Wailua River to the Fern Grotto. We detail ticket options, park fees, and the differences between riverboat cruises and independent kayak rentals.

We review operator data, state park announcements, and visitor feedback to keep information accurate. Prices and schedules change, so always verify final details before booking.

How we make money

Booking links go to Viator and GetYourGuide. If you book through them we may earn a commission, at no extra cost to you. See the affiliate disclosure.