The Carneddau (lit. "the cairns"; Carneddau is a Welsh plural form, and is sometimes anglicised to Carnedds) are a group of mountains in Snowdonia, Wales. They include the largest contiguous areas of high ground (over 2,500 or 3,000 feet (910 m) high) in Wales and England, as well as six or seven of the highest peaks in the country—the Fourteen Peaks. The range also encloses a number of lakes such as Llyn Cowlyd and Llyn Eigiau, and the Aber Falls waterfalls. It is delimited by the Irish Sea to the north, the Conwy valley to the east, and by the A5 road from Betws-y-Coed to Bethesda to the south and west. The area covers nearly 200 square kilometres, about 10% of the area of Snowdonia.
The Carneddau leg of the Welsh 3000 route leading a group making a 24hr attempt. Took east ridge route up PYOW, Yr Elen before Carnedd Llewellyn and descended to car park at SH 675 716. Visibility good up to Carnedd Llewellyn were cloud reduced it to around 50m. It remained like this until just above Llyn Anafon. 
