Hi Ian, The early part to M. Hebog will be no problem, some of it might even be marked.
Descend from M. Hebog on the left of the wall all the way down, it is quicker. M. Yr Ogof and M. Lefn have false rocky tops. At the foot of Y Gyrn, by the forest go left (flagged usually).
The scramby ascent after the obelisk is best tackled directly if you don't mind an easy scramble. After that, if visibility is bad, follow a bearing on the plateau to the wall corner. After the CP at Carnedd Goch follow a SE bearing. It is rough. You might drop close to stream on right but not much better! Down to Cwm Chiprwth, stay on left of stream, past sheepfolds right on path (usually flagged), good track to road. Tough race!
CWM P.jpg