Neny Matterhorn is a sharp, pyramid-shaped peak over 1,125 m, standing in the northwest part of the Blackwall Mountains on the south side of Neny Fjord, Graham Land. First roughly surveyed in 1936-37 by the British Graham Land Expedition (BGLE) under Rymill, and resurveyed in 1948-49 by the Falkland Islands Dependencies Survey (FIDS).