Loudoun Hill (Scottish Gaelic: Beinn Lùghdain; also commonly Loudounhill)[1] is a volcanic plug in East Ayrshire, Scotland.

Robert the Bruce, following his time in hiding after the Battle of Methven, had begun his campaign to wrest his kingdom back from Edward I of England.

Robert Bruce adopted almost the same site, although slightly further east, and similar tactics, for another encounter with English forces, this time under Aymer de Valence, 2nd Earl of Pembroke.

On 10 May, Bruce's men dug a series of trenches, forcing the English towards boggy ground around Loch Gait.

John Graham of Claverhouse, recently appointed to suppress the religious rebels, heard about the conventicle and headed to the area.

The hill is a popular rock climbing venue, being home to some of a small number of rocky outcrops in central Scotland.

The ruins still stand and provide shelter for the sheep from surviving farms that continue to graze Loudoun Hill and the surrounding fields.