Kāneʻohe Bay, at 45 km2, is the largest sheltered body of water in the main Hawaiian Islands. This reef-dominated embayment constitutes a significant scenic and recreational feature along the northeast coast of the Island of Oʻahu. The largest population center on Kāneʻohe Bay is the town of Kāneʻohe.
The Bay is approximately 8 mi long and 2.7 mi wide, with a mouth opening of about 4.6 mi wide and a maximum depth of 40 ft in the dredged channel. It has one of the two barrier reefs in the archipelago, the other being the 27 mi barrier reef of Molokaʻi island, and also has extensive development of shoaling coral reefs within a large lagoon. Two navigable channels cut across the northern and southern ends of the barrier reef.
Wikipedia https://en.wikipedia.org/wiki/Kāneʻohe_Bay
Address 47-87 Kamehameha Hwy, Kahaluu 96744, United States
Coordinates 21°27'14.752" N -157°48'59.441" E