Kangaroo Island lies off the mainland of South Australia, southwest of Adelaide. The island is 145 kilometres (90 mi) long West/East and between 0.94 and 54 km (1 and 34 mi) from its narrowest to widest North/South points. Its area covers 4,405 km2 (1,701 sq mi). Its coastline is 540 km (336 mi) long, and its highest point of 307 metres (1007 ft)[1] is in Flinders Chase National Park, west of the junction of the Playford and West End Highways. The second highest point is Mount MacDonnell at 299 m (981 ft) above sea level.[2] It is separated from Yorke Peninsula to the northwest by Investigator Strait and from Fleurieu Peninsula to the northeast by Backstairs Passage. A group of islets, the Pages, lie off the eastern end of the island.