Mount, a peak in the Black Hills of South Dakota that is a memorial (Mount Rushmore National Memorial) having 60-foot (18-meter) busts of Washington, Jefferson, Lincoln, and Theodore Roosevelt, carved into its face between 1927 and 1941, from a design by and under the direction of Gutzon Borglum. 5600 feet (1707 meters).
British Dictionary definitions for rushmore mountain
Mount Rushmore, a mountain in W South Dakota, in the Black Hills: a national memorial, with the faces of Washington, Lincoln, Jefferson, and Roosevelt carved into its side by Gutzon Borglum between 1927 and 1941. Height: 1841 m (6040 ft)