East Honolulu
Hawaii's top snorkeling spot — crystal-clear bay sheltered from open-ocean swells. Reef fish density is extraordinary. Bring your own gear (rentals available but overpriced). Shallow inner bay ideal for beginners; stronger swimmers venture to the slot channels.
Reservations required at hanaumabaystatepark.com — opens 7am HST two days in advance. $25 entry + $3 parking. Mandatory 9-minute marine video on arrival. Closed Tuesdays. Reserve the entry 2 days ahead.
Closed if waves exceed 2 feet at bay entrance — confirm conditions before driving.