It was owned by John Bisset who acquired lands between Larne and Ballycastle from Hugh de Lacy, the Earl of Ulster.
Bisset made Glenarm his capital, and by 1260 there was a castle, which stood at the centre of the present village, with a kitchen garden, an orchard and a mill, as well as woods and meadows.
O'Donnell had sent messengers for the steed but was refused it so he made no delay, but surmounting the difficulties of every passage he arrived at night at MacEoin's house without giving any warning of his designs.
The Dalriada Festival is also held at Glenarm Castle and within the local village, which celebrates sport, music and fine food from all over Scotland and Ireland.
Summer Madness, Ireland's biggest Christian Festival, moved from its annual residence at the Kings Hall, Belfast, to Glenarm Castle in 2012.