Poor neglected Mauherslieve! Its out-of-the-way nature is part of its charm, the dog and I spent the afternoon without seeing another human soul, though we did spot a rabbit and two deer. We parked by a livestock pen at R880 638 E (there's room for a couple of cars), and then followed the track marked in sheet 59 through the forest as far as R869 626 F. Here the clear felling starts, so we turned left and made our way up to the summit without having to push through the dense pine.
The summit trig pillar appears to have been constructed on the ruins of an ancient cairn, a collapsed part of which forms a shelter from the wind. Nice views over to Keeper Hill and surrounding hills. Linkback: https://mountainviews.ie/summit/368/comment/2646/