In reply to steve:
Hi Steve, there is loads of stuff. When we where there at Easter we saw a lot of massive boulders inland from Carrickfinn, can't remember exactly where but there is a huge boulder beside the road north (on the mainland) of Carrickfinn. There is a beach south of Burtonport that is worth a look for some bouldering and soloing (go at low tide). This is the work in progress. www.theshortspan.com/donegalphotos/donegal.htm
I assume you are going to be in the Gweedore/Bunbeg area?
There is also stuff in the Bluestacks and Eglish.
Mail me if you want more information. Let me know how you get on?