Climbed from Bencroy. Best route is to get onto the higher edge of Bencroy, via the path that leads to the old quarry (right fork off the main path) and head for the obvious ridge that leads to Knockacullion. By coincidence I followed the same whitish, rushy "path" mentioned by eflanaga, even though I had not read his comments before I climbed. While this is a bit wet and soft in places, it is a much better alternative to the high heather and wet bog that lie in the more direct route, which should be avoided except you are in the mood for hardship. The top is featureless except for a small lake - see photo, with Slieve Anierin in the background. There are great views of all the surrounding hills and you can clearly see well into Sligo on a good day - Knocknarea was visible when I was on top. The highest point is about 30 metres West of the lake. Linkback: https://mountainviews.ie/summit/337/comment/3138/