Mount Castro () is a mountain, high, on the north side of

Seller Glacier Seller Glacier is a well-defined glacier, 20 nautical miles (37 km) long and 4 nautical miles (7 km) wide flowing westward into Forster Ice Piedmont, western Antarctic Peninsula, just north of Flinders Peak. Roughly surveyed by British Gr ...

, southeast of Mount Gilbert, in the central

Antarctic Peninsula The Antarctic Peninsula, known as O'Higgins Land in Chile and Tierra de San Martín in Argentina, and originally as Graham Land in the United Kingdom and the Palmer Peninsula in the United States, is the northernmost part of mainland Antarctic ...

. It was photographed from the air by the British Graham Land Expedition in 1937, and by the

Ronne Antarctic Research Expedition The Ronne Antarctic Research Expedition (RARE) was an expedition from 1947–1948 which researched the area surrounding the head of the Weddell Sea in Antarctica. Background Finn Ronne led the RARE which was the final privately sponsored exp ...

in 1947. It was surveyed from the ground by the

Falkland Islands Dependencies Survey The British Antarctic Survey (BAS) is the United Kingdom's national polar research institute. It has a dual purpose, to conduct polar science, enabling better understanding of global issues, and to provide an active presence in the Antarctic on ...

in December 1958, and named by the

UK Antarctic Place-Names Committee The UK Antarctic Place-Names Committee (or UK-APC) 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 (BAT) and ...

for

João de Castro Dom João de Castro (27 February 1500 – 6 June 1548) was a Portuguese nobleman, scientist, writer, and the fourth viceroy of Portuguese India. He was called ''Castro Forte'' ("Stronghold" or "Strong Castle") by the poet Luís de Camões. De Cas ...

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

magnetic compass A compass is a device that shows the cardinal directions used for navigation and geographic orientation. It commonly consists of a magnetized needle or other element, such as a compass card or compass rose, which can pivot to align itself with ...

References

Mountains of Palmer Land {{PalmerLand-geo-stub