Taking the second left hand turn outside of Rathgormack follow the road to its end where there is parking in a farmyard with directions to the trailhead map.Full credit to the owners of this land allowing parking here.I followed the purple boola loop all the way to the Coum Larther loughs and after a short while exploring the area headed west along ill defined tracks to the Gap.The fog was lying low during my trip to the Gap but had cleared when I got there so I pushed on NW up onto the Knockanaffrin ridge keeping the fence to my right passing by the viewpoint to Coumduala lough and up onto Knockanaffrins rocky summit,there are a couple of these rocky outcrops on the way and when the fog came back down I had to use the altimeter to ascertain I had reached the summit.After a couple of nervy moments in the fog I got my bearings with compass and map and made my way back to the Gap picking up the return of the Boola loop following a trail of white poles back onto my original track to the car.Distance 16.6 km,time 4 hrs 18 mins,ascent 865m,descent 855m.On hindsight if climbing this summit again I would take the route from Lough Mohra which would seem more direct. Linkback: https://mountainviews.ie/summit/74/comment/18353/