Supporting Party Mountain (85°27′S147°33′W) is a mountain, 560 m, standing 3 miles (4.8 km) east of Mount Fridovich in the Harold Byrd Mountains. Discovered in December 1929 by members of the Byrd Antarctic Expedition Geological Sledging Party under Laurence Gould. Named by them in appreciation of the splendid cooperative work of their Supporting Party.