Chilean Antarctic Territory
Mount Macelwane () is the highest peak in the eastern part of the Nash Hills of Antarctica. The peak was positioned by the U.S. Ellsworth–Byrd Traverse Party on December 14, 1958, and named for Reverend James B. Macelwane, S.J., first chairman of the Technical Panel for Seismology and Gravity of the U.S. National Committee for the International Geophysical Year, as set up by the National Academy of Sciences. It lies within the Chilean Antarctic Territory.