This route actually takes in the cairn on Knocnascallop and not the NW top which is five metres higher. My plan was to take in the NW top but after driving around it seemed that parking and access for Knocknascallop proper was much easier. There is a carpark at Carrowmore Lake lake at F83035 28297 G. From here follow the road South for a couple of hundred metres until you see a good place to head out onto the open hillside. From here it's little over a kilometre climb to the cairn at the summit. If you have time you could make a ridge walk over to the NW top and drop down to the road following the lake back to the carpark. As I had climbed a few other hills in the area earlier that day, I did not have the will or the energy to do this. For the sake of five metres, I'm claiming this one. Linkback: https://mountainviews.ie/summit/1006/comment/20650/