Mount Castro is a mountain, 1630 metres (5,347.8 ft) high, on the north side of Seller Glacier

Seller Glacier

Seller Glacier is a well-defined glacier, 20 nautical miles long and 4 nautical miles wide flowing westward into Forster Ice Piedmont, western Antarctic Peninsula, just north of Flinders Peak...

, 5 miles (8 km) southeast of Mount Gilbert

Mount Gilbert (Antarctica)

Mount Gilbert is a mountain on the divide between Airy Glacier and Seller Glacier, northwest of Mount Castro, in the west-central Antarctic Peninsula....

, in the central Antarctic Peninsula

Antarctic Peninsula

The Antarctic Peninsula is the northernmost part of the mainland of Antarctica. It extends from a line between Cape Adams and a point on the mainland south of Eklund Islands....

. It was photographed from the air by the British Graham Land Expedition

British Graham Land Expedition

A British expedition to Graham Land led by John Lachlan Cope took place between 1920 and 1922. The British Graham Land Expedition was a geophysical and exploration expedition to Graham Land in Antarctica between 1934 to 1937. Under the leadership of John Riddoch Rymill, the expedition spent two...

 in 1937, and by the Ronne Antarctic Research Expedition

Ronne Antarctic Research Expedition

The Ronne Antarctic Research Expedition was an expedition from 1947-1948 which researched the area surrounding the head of the Weddell Sea in Antarctica.-Background:...

 in 1947. It was surveyed from the ground by the Falkland Islands Dependencies Survey in December 1958, and named by the UK Antarctic Place-Names Committee

UK Antarctic Place-Names Committee

The UK Antarctic Place-Names Committee is a United Kingdom government committee, part of the Foreign and Commonwealth Office, responsible for recommending names of geographical locations within the British Antarctic Territory and the South Georgia and the South Sandwich Islands...

 for João de Castro

João de Castro

Dom João de Castro was a Portuguese naval officer and fourth viceroy of Portuguese India. He was called Castro Forte by poet Luís de Camões. Castro was the son of Álvaro de Castro, civil governor of Lisbon...

, a Portuguese navigator who made pioneer experimental investigations of the variation of the magnetic compass.