In reply to UKC Articles:
Great article!
However as a climber and regular visitor to the area I can add a couple of bits... Travel wise you can fly direct into Derry Airport, which also has car rental facilities and, being just over the border, is a short drive to Donegal. There's also an excellent indoor climbing wall in Derry, which is worth knowing in case it rains. Which it will.
There's also a yearly Climbfest held by a local climbing club every year over the Mayday bank holiday. We went a couple of years ago, and it's a great way to meet other climbers in the area and discover new routes and crags.