Park at a forest entrance R850 665 A , room for 5 cars, walk into the forest right at R844 663 B which will bring you through the forest onto moorland. As it peters out you have a rough 200 meter crossing this moor to the summit.
Note : the road that this entrance is on is marked in the Discovery series of maps as unpaved, as of 2009 it has a good tarmac surface which I followed all the way to the paved road to the south of the Silvermines near Cooleyhorney.
Another way up is via the Slieve Felim way. Leave this at R8389 6729 C. Go south and take a left turn after about 1500m, follow the track to a T junction turn right, then take a left turn until you reach open ground and the summit area.
Perhaps the quickest way up is to park at around R850 668 D Go uphill and east through mature trees eventually emerging onto the rough heather of the summit area. Linkback: https://mountainviews.ie/summit/779/comment/5538/

I drove to forestry entrance R850 665 A where I startled a family of grazing deer. The forestry track will bring you to R844 663 B where you turn right and continue along the track until it emerges from the forestry and comes to an end at a turning circle R846 666 G. The summit is on your left, about 200m across rough ground. Great view of Keeper. Linkback: https://mountainviews.ie/summit/779/comment/14974/