Calf of Man (Manx: Yn Cholloo), is a 618-acre (250 ha) island (almost 1 square mile), off the southwest coast of the Isle of Man. It is separated from the Isle of Man by a narrow stretch of water called the Calf Sound. Like the nearby rocky islets of Chicken Rock and Kitterland, it is part of the parish of Rushen. It has only two seasonal inhabitants. The word 'calf' derives from the Old Norse word kalfr which means a small island lying near a larger one. It is possible to reach the Calf of Man by boat from both Port Erin and Port St Mary. Cow Harbour and South Harbour are the main landing places. The highest part of the island is in the west where an unnamed peak reaches 415 feet (128 metres) above sea level.