I approached Coomnalack from Knocknagorraveela, it is a failry straightforward 2.5km trek over mainly boggy terrain
followed by an ascent up easy angled slabs to small summit plateau, the actual top of Coomnalack sits above a tiny unamed lough that appears on OS 85. Coomnalack is situated in a stunning location surrounded by a magnificent amphitheatre of higher mountains and with brilliant views out over Glaninchiquin. I parked at V89621 63552 A, which gave a round trip of approx12.5km and took me 3hrs. Linkback: https://mountainviews.ie/summit/671/comment/20912/

This top squats cheekily next to 'the lake on the saddle' mentioned by Lynam in Best Irish Walks when describing the trip round the head of Gleninchaquin: in the picture included it's seen from the rather slithery descent from Coomnadiha. Personally, I gained it by crossing the lake outflow and trudging up the obvious avenue of grass leading up diagonally left: from the head of this the top is a few clambery minutes away to the right. Those with more time might prefer to gain the skyline to the right of the top (just off the right of the pic), as that ridge looks quite entertaining in profile. This whole area is a tangle of steep grass, knolls and glacially scoured rock, which I'd imagine would be 'interesting' if the cloud was down: on a fine day, it's an excellent and not-that-testing circuit. Linkback: https://mountainviews.ie/summit/671/comment/3775/