The southern zone, including the route from bRhyd/b Ddu into Cwm by/b llan and also Cwm Dyli, is visited in a later chapter, The Perfect Line). ------------------------------- Summer grazings and settlements of Cwm Brwynog (including the b..../b The walk along the ridges of bFoel/b Goch and Moel Cyghorion is open and undulating, with rocky scarps on the Llanberis side and steep grassy slopes on the south west. Rather than take this course I followed a field wall contouring around the ...