Randall Island is part of the Dundas Archipelago, a group of islands located in Hecate Strait, on the west side of Chatham Sound between Brown and Caamaño Passages, about 22 miles (35 km) northwest of Prince Rupert, British Columbia.
The Dundas Archipelago was named in 1792 by Captain George Vancouver for Henry Dundas, who was the Treasurer of the Navy from 1783–1801. Dundas was granted the title of Viscount Melville in 1802 and also named Baron Dunira. The Dundas Islands were originally perceived by Vancouver to be one island which he named Dundas Island, but are now known to consist of several smaller islands. Among these are Baron Island, Dunira Island, Melville Island, and Randall Island.
Chatham Sound is on the border between British Columbia and Alaska. It is part of the Inside Passage and extends from Portland Inlet in the north to Porcher Island in the south. It may have been named in 1788 by British Captain Charles Duncan after John Pitt, 2nd Earl of Chatham, who was First Lord of the Admiralty at that time. The sound has an area of about 600 square miles (155,399 ha) and is connected to the open waters of Hecate Strait and Dixon Entrance via several channels, such as Main, Brown, Hudson Bay, and Edye Passages. Along its southern end, the sound provides access to inland passages such as the Marcus and Arthur Passages, and the Grenville Channel beyond that. The two major rivers that drain into the sound are the Nass River (via the Portland Inlet) and the Skeena River (via the Inverness and Marcus Passages). The salinity of the sound is lower than the adjacent ocean because of the large inflow of freshwater. Read more here and here. Explore more of Randall Island and Chatham Sound here: