This spectacular summit can be reached without much effort from the nearby Military Road. A good track leads straight to the top. Please note that this is a permissive path.
The views from up there are the best to be had except for a clear day on Lugnaquilla. Linkback: https://mountainviews.ie/summit/168/comment/20772/

The photo shows pretty much a full circuit starting from the notch SW of Fananierin Mountain (access from military road at T 102 892 A, across a field and then with a short, sharp pull to the top at T 108 887 B). It follows the ridge SW to the nameless hilltop on right. (Recently an orgy of mindless quad-biking has churned up the ground close to this hill.) It then picks up the track SE to Croaghanmoira in centre, and descends NE to the hollow leading to Ballinacor Mountain (not visible in photo). To complete the circuit, it is necessary to descend northwards into the valley and climb again to the notch behind Fananierin summit. Where one decides to go about this is slightly problematical, since the preserved grounds of Ballinacor Estate make the most direct route inadvisable. (I admit myself to having walked over this land one day and I felt I was disturbing wildlife a lot less than the Dutch financier to whom a memorial has been erected there, celebrating his love for shooting the abundant pheasant on the Estate!) There is a stream in the valley which can swell quickly after heavy rain, but it can usually be crossed without difficulty. This is a relatively short walk (between 8-10 kms, depending on where you cross back to Fananierin). On a good day, the views, especially from Croaghanmoira, are superb. Linkback: https://mountainviews.ie/summit/168/comment/2711/

View of the distinctive Croghanmoira from the summit of Lugnaquilla Wicklow's highest peak Linkback: https://mountainviews.ie/summit/168/comment/20140/

Did from Drumgoff gap following the recommended estate path as shown on the sign and map on the path. A Quick up and down including the Nth top. Extremely windy. So windy that I had to get on hands and knees at the trig and shoogle back down on my backside.
The estate access route includes the Fananierin ridge which would be great on a less windy day. Linkback: https://mountainviews.ie/summit/168/comment/20349/

One Feb day, near sunset, this was the view of Croaghanmoira from Scarr to the north. Linkback: https://mountainviews.ie/summit/168/comment/2606/