This route goes around the north west side of Gouganebarra Lake.
It would be possible to start from a variety of places around the south side of this lake from the hotel to the paid entry (€5) forest park.
The walk uses forest tracks to get as high as possible and then branches off towards Bealick. The ground once you leave the track is rough though gradually gets better as you get higher. Others have mentioned a faint path to Bealick, however we did not find it.

As of 2018 there is a modern fence along which you can navigate to the top. Bealick is at the junction of fences near a small outcrop and appears to be on the county line between Cork and Kerry. Its exact position would take surveying equipment - the spot height shown on the 1:50000 is probably too far west by several tens of metres.
From here it is possible to see the col at the west end of the Gougane Barra, along with the route to Carran and the Conigar to Foilastookeen ridge to the south.
The route continues to Coomataggart SW which has a variety of possible summits in a rough line. The OS 1:50000 has a spot height towards the NW of this line. While, by eye, this does not appear to the be highest point it has a small cairn and as of 2018 a view of the huge windfarm being built around the upper reaches of the Roughty River and known as Grousemount Windfarm. This valley will cease to be a wild place following the creation of the windfarm.

There is another cairn to the SE of the OS spot height, which looks higher and also appears to be on the Cork-Kerry border. Continue on to Coomataggart over rough heathery ground. Its top is also pretty vague. There is a cairn in one place which would be a candidate for the highest point.
Coming down from the summit to the road and approximately south is easy enough until around 400m from the road, where the ground becomes tussocky and extremely slow to move through. While possible, a better route would be desirable.
Return then to the starting point along the road to Gougane Barra. There is a café, Cronins, which as of Sept 2018 was open until 18:00. There is hotel which has a restaurant if you are interested - high quality but not cheap.
Return to wherever you started from - the place shown in this track has a toilet block.