The South Barrule (Manx: Baarool Jiass) is the highest hill in the south of the Isle of Man. It has the remains of a fort on its summit, which is traditionally the home of the Manx god of the sea Mannanan beg mac y Leir. The hill is largely surrounded by conifer plantations. On the south western slope of the hill the Cringle Reservoir was formed to supply water to the southern part of the island. South Barrule's ancient name was Warfield or Wardfell.