Slieve True or Slievetrue is a 312 m hill in County Antrim, Northern Ireland. It is near Knockagh Monument and Monkstown, about 6 km north of Belfast. Slieve True derives its name from three standing stones (known as "The Three Brothers") about 1/2 mi southwest of the summit. These have since been integrated into a field wall. There is also a cairn in the area. In May 2013, Irish electricity company Gaelectric opened a wind farm in the Carn Hill area of Slievetrue, consisting of six wind turbines at a total cost of £20 million.