The Grove Mountains are a large, scattered group of mountains and nunataks extending over an area of approximately 40 by 20 miles (60 by 30 km), located 100 miles (160 km) east of the Mawson Escarpment in American Highland, Antarctica. They were first photographed from the air by aircraft of U.S. Navy Operation Highjump, 1946–47, and named by the Antarctic Names Committee of Australia for Squadron Leader I.L.