Vinson Massif is the highest mountain of Antarctica, located about 1,200 km (750 mi) from the South Pole. The mountain is about 21 km (13 mi) long and 13 km (8 mi) wide. At 4,892 metres (16,050 ft) the highest point is Mount Vinson, which was named in 2006 by US-ACAN. The southern end of the massif ends at Hammer Col, which joins it to the Craddock Massif, of which the highest point is Mount Rutford (4477 m).
The massif lies in the Sentinel Range of the Ellsworth Mountains, which stand above the Ronne Ice Shelf near the base of the Antarctic Peninsula.
A high mountain, provisionally known as 'Vinson' was long suspected to be in this part of West Antarctica, but it was not actually seen until January 1958, when it was spotted by US Navy aircraft from Byrd Station. It was named after Carl Vinson (also the namesake of an aircraft carrier), a United States Georgia Congressman who was a key supporter of funding for Antarctic research.