From Newcastle West take the N21 for Abbeyfeale turning right uphill at Garryduff about 5 kms from Newcastle West.
Make your way to the turn at R21044 34705 A to a forest entrance. The public road system is extremely confusing but is well shown on OSi maps.
Walk east, cross a berm and find a recessed track and follow this through the forest area (clear felled as of 2012). Make one right turn off this nearing the top (R2151 3474 B) and get to the trig pillar.
There would also be other easy routes up from the north and particularly to the east of the summit going beside a telecoms mast there.
Good view across plains towards Limerick , Mullaghareirk Mountains behind but not towards the south. Linkback: https://mountainviews.ie/summit/907/comment/5666/

I happened to be passing through Newcastle West at lunchtime today and instead of a chicken sandwich I had a mountain.I was lucky to have a pair of wellingtons in the car boot and so the stage was set for the conquest of mighty Knockanimpaha! In truth it was almost too easy.I had an idea from the OSI aerial photos that the summit was covered in trees, but as of 2010 it isn't. I parked just off the road at R20942 34389 E and went straight across the felled trees and onto a track after 200 meters, I turned right and then left and kept going uphill until I arrived next to the Trig pillar.Good view across plains towards Limerick with windmills and the Mullaghareirk Mountains behind. If you're passing give it 20 minutes, well worth the effort Linkback: https://mountainviews.ie/summit/907/comment/4566/