Starting from Barfinnihy Lough this route takes the north side of the Lough and traverses to the col between Boughil and Cnoc na gCapall. From the latter it then goes to Boughil and back via a steep route towards the lake.
Advice. The route down from Boughil is steep and a better route would start off NW from the summit. Second, the route to the lake is not easy to find and is not obvious in the contours of the 1:50,000 OSi map, though more evident at some resolutions in the contours of the 1:10,000 OSi mapping selectable on this site. It could be hard to find in bad weather and treacherous in icy conditions.