Route over Knocknahillion, Cnoc na hUilleann North Top, Letterbreckaun and Binn Bhriochain NE Top. The route uses the Western Way to the west of the range, beginning at V93526 80439 where there is room for 2 cars where the Western Way meets the road.
The route goes north along the WW for a couple of hundred metres, crosses a bridge (but not a second one) before heading northeast along a stream (unnamed on OS 37) up towards the area marked as Benadolug, passing north of the first peak, Knocknahillion. You can keep this line all the way to the col, making your ascent of Knocknahillion easier, or, if you feel like scrambling, head directly for that hill earlier. From there head towards Cnoc na hUilleann, avoiding straying too much east of the direct line, or you will encounter steep ground at the edge of the coum to the east, and be forced, as I was, to have to reclaim some lost height. There follows a long but straight forward ridge to Letterbreckaun and its NE Top followed by an easy ascent down the spur marked Gowlaunard on OS37, and a return via the Western Way.
I am sure the views are magnificent; however, on the day I visited, visibility was sometimes as low as 50m and I saw little.