Corunna Downs Airfield was a secret Royal Australian Air Force (RAAF) base at Corunna Downs, 40 km (25 mi) south of Marble Bar in the Pilbara region of Western Australia during World War II. In 1942 the RAAF built a secret airbase on Corunna Downs Station, adjacent to the 1891 homestead. The airfield, created especially for B-24 Liberator long-range heavy bombers, comprised two intersecting bitumen runways, a north–south (165°) runway 5,000 ft × 150 ft (1,524 m × 46 m) and an east–west (107°) runway 7,000 ft × 150 ft (2,134 m × 46 m). The base has been abandoned since World War II.