From UMHC Hiking Guide
The Nantlle Ridge is the name given to a small range of hills in Snowdonia, north Wales which runs south-west from the village of Rhyd Ddu for a distance of about 9 kilometres, ending above Talysarn and Nebo in the Nantlle Valley.
The Nantlle Ridge offers excellent hill walking with fewer crowds than on the more popular parts of Snowdonia. It can be started from either end, but the Rhyd Ddu end tends to be the most popular. There are no great technical difficulties, although a little scrambling may be required on some parts of the ridge.
A large obelisk marks the summit of Mynydd Tal y Mignedd.
The classic traverse of Nantlle Ridge traverses about five summits and negotiates some quite narrow and exciting ridges. There is some scrambling to be had on these ridges and they overlook sheer 150m drops and so provide an ideal introduction to narrow ridges. There is one avoidable section that involves grade 2 scrambling at the base of the highest summit, Craig Cwm Silyn.
Starting from the Rhyd Ddu end, the Nantlle Ridge is composed of Y Garn (633 m), Mynydd Drws-y-Coed (695 m), Trum y Ddysgl (709 m), Mynydd Tal-y-Mignedd (653 m), Craig Cwm Silyn (734 m), Garnedd-goch (701 m) and Mynydd Craig Goch (609 m).
(2.1x vertical exaggeration)
