The Blackstairs Challenge will be held on[masked]. This year the organisers are limited to 200 participants so if you are interested please keep an eye on their page.
OR add yourself to the mailing list ( [masked] )
This Challenge is a 31km hike with about 1600m height gain, all over track and trail and entry fee is €22.
If you haven't done a challenge hike before, this one is about the best one to start off with.