Castleislands annual horse fair occurs in the month of November each year. The fair takes place on the main street where horses, ponies, donkeys, other animals and equipment are for sale.

It is a family friendly event and wishes to welcome everyone to this fair – from locals to people who have travelled from different places to come to this festival.It is very important for the town of Castleisland and it produces large numbers of people to the town therefore restaurants, pubs and other businesses are fully booked and gain a profit from this.