[1] The Trinity Inlet is located in the original delta of the Mulgrave River, which since the Pleistocene flows to a mouth further south.

The region's only tanker berth and the Royal Australian Navy base HMAS Cairns are located on the inlet.

In recent years, the Queensland Government has undertaken a major remediation project to prevent the acid discharge and rehabilitate the land behind the levee.

A commercial saltwater crocodile farm is in operation on the upper reaches, though wild examples are still very rare in the area after hunting in the early 20th century.

This area is sacred to the Indigenous Yidinji peoples of gimuy for its rich cultural stories including (but not limited to) Kuyala the Sea Eagle.