Downs Cone () is one of several small cones or cone remnants along the southwest side of Toney Mountain in Marie Byrd Land, located 3 nautical miles (6 km) west-southwest of Boeger Peak. It was mapped by the United States Geological Survey from ground surveys and U.S. Navy air photos, 1959-66, and was named by the Advisory Committee on Antarctic Names for Bill S. Downs, a U.S. Navy Air Controlman at Williams Field near McMurdo Station in the 1969-70 and 1970-71 austral summers. He wintered at Little America V on the Ross Ice Shelf, 1958.