The Nantlle Ridge from Rhyd-Ddu to near Maen-llŵyd. With daughter, Katherine. Followed good path from SH566526 which goes steeply up to the summit of Y Garn. Good visibility here but mist came down for scramble up Mynydd Drws-y-coed. Compass in use for ascent of Trum y Ddysgl and on to Mynydd Tal-y-mignedd. The connecting col between these two hills has a level platform with very steep sides with a somewhat disconcerting dip half way along. It is easy enough to negotiate, though.