This summit is relatively easily reached with careful navigation through the lakes and roughish ground from the Kerry Way to the East.
We did it as 2nd top of a five summit, seven hour round (yes 7 hours) of Knockanaguish, Foardal, Derrygariff, Peakeen Mountain West Top and Peakeen starting at approx V917751 B (T junction on Kerry Way North of Kenmare, parking limited to a couple of cars on left either side of a gateway) and going anti-clockwise a tough circuit with over 1200m of cumulative ascent and only 11km but over very demanding ground, and you will need to be able to navigate if it's misty!
We walked North on Kerry way to a gate on the right at about V917755 C, crossed this and traversed the moorland NE to a fence which we followed to a little gate which we went through and continued to the top of Knockanaguish.
W from this summit to Kerry Way again (Steep drop off and very slippy ground, but you could use this caution all through this walk!) we followed the KW about 500m N crossing a stream then left and uphill W to Glas Loughs which we bisected at about V894778 D, then on to Foardal summit.
The remainder of the walk was tough as the mist made us work the compass and GPS, and there were many up's and down's. The real beauty of this circuit is that there are hardly any boot prints, let alone tracks or paths(none!). Actually apart from the concrete trig on Peakeen, you could almost swear no-one had been here before, as there aren't any cairns or summit furniture descecrating these hills. Linkback: https://mountainviews.ie/summit/777/comment/16053/