Sitting between the Vale of Ffestiniog and Llyn Trawsfynydd in the north, down south as far as the Mawddach Estuary next to Barmouth lies the remote Rhinogydd area. This area posseses a distinct character of its own, more remote and rugged. This is a by-product of the geology of this region, sometimes referred to as the Harlech Dome. These are some of the oldest rock formations in the UK.
The western Rhinogydd are marked by two valleys – Cwm Nantcol (valley of the Nantcol River) and Cwm Bychan (small valley). These provide the two main access points to the rugged Rhinogydd from the west Llanbedr.