The Eifionydd are the western range in the Northern Snowdonia. For those approaching Beddgelert from the east on the A498, the skyline is dominated by the huge mass of Moel Hebog. From here, the range extends north following the western side of the Nant Colwyn valley towards Caernarfon. The Eifionydd can be considered as three distinct sub-ranges :
- Moel Hebog, Moel yr ogof and Moel Lefn ridge
- The Nantlle ridge (above Rhyd Ddu)
- Mynydd Mawr (above Llyn Cwellyn)
Moel Hebog above Beddgelert offers the walker a very accessible challenge. Those that reach the summit are treated to fine views down into Cwm Pennant.
For those looking for a more rugged challenge then the Nantlle Ridge offers one of the best ridge walks in Snowdonia. The challenge is that it is a linear ridge so the logistics of start and end of your walk needs some consideration (to avoid having to retrace your steps). The ridge is a series of distinct peaks offering views to the south into Cwm Pennant, or north towards Caernarfon and Anglesey.