Trinity Bay is a large bay in the

Coral Sea The Coral Sea () is a marginal sea of the South Pacific off the northeast coast of Australia, and classified as an interim Australian bioregion. The Coral Sea extends down the Australian northeast coast. Most of it is protected by the Fre ...

off the east coast of

Far North Queensland Far North Queensland (FNQ) is the northernmost part of the Australian state of Queensland. Its largest city is Cairns and it is dominated geographically by Cape York Peninsula, which stretches north to the Torres Strait, and west to the Gulf C ...

, Australia. The

Mossman River The Mossman River is a river located in the Cape York Peninsula of Far North Queensland, Australia. The headwaters of the river rise under Devils Thumb on the Mount Carbine Tableland in the Great Dividing Range. The river flows through a dee ...

discharges into the bay. At one time the

Mulgrave River The Mulgrave River, incorporating the East Mulgrave River and the West Mulgrave River, is a river system located in Far North Queensland, Australia. The -long river flows towards the Coral Sea and is located approximately south of . Location ...

also entered the bay until geological changes resulted in its mouth forming further south at Port Constantine. The bay was named after the Christian holy day

Trinity Sunday Trinity Sunday is the first Sunday after Pentecost in the Western Christianity, Western Christian liturgical year, liturgical calendar, and the Sunday of Pentecost in Eastern Christianity. Trinity Sunday celebrates the Christian doctrine of the ...

by Lieutenant

James Cook James Cook (7 November 1728 Old Style date: 27 October – 14 February 1779) was a British explorer, navigator, cartographer, and captain in the British Royal Navy, famous for his three voyages between 1768 and 1779 in the Pacific Ocean an ...

on 10 June 1770. At its southern end is the city of

Cairns Cairns (, ) is a city in Queensland, Australia, on the tropical north east coast of Far North Queensland. The population in June 2019 was 153,952, having grown on average 1.02% annually over the preceding five years. The city is the 5th-most-p ...

. Here there are extensive

mangrove A mangrove is a shrub or tree that grows in coastal saline water, saline or brackish water. The term is also used for tropical coastal vegetation consisting of such species. Mangroves are taxonomically diverse, as a result of convergent evoluti ...

ecosystems which are protected by

Cape Grafton Cape Grafton is a cape located to the north-east of Cairns in Queensland, Australia. The cape was named by Lieutenant James Cook during his first voyage of discovery in 1770. It was named after Augustus FitzRoy, 3rd Duke of Grafton, the Britis ...

Trinity Inlet The Trinity Inlet is an oceanic inlet which serves as the port for the city of Cairns, Queensland, Australia. The city centre is on the western bank where the inlet meets the Coral Sea. Location and features The Trinity Inlet is located in ...

and Trinity Bay form the location for the Cairns seaport. Trinity Bay State High School is a school located in Cairns.

References

Landforms of Far North Queensland Cairns, Queensland Bays of Queensland Bodies of water of the Coral Sea {{FarNorthQueensland-geo-stub