Conwy Area
Northern Region
Isle of Anglesey
The Carneddau and
the Glyderau

West Coast
South West
South East
Map and Satellite

Carneddau and

Carnedd Dafydd
Carnedd Llywelyn
Cwm Idwal
Glyder Fawr
Llyn Bochlwyd
Llyn Cowlyd
Llyn Eigiau
Llyn Ogwen
Ogwen Falls
Pen Yr Ole Wen

Llyn Ogwen

OS Grid Ref:- SH 6560

Dramatic Llyn Ogwen, one of the most popular lakes in Wales, is situated south of Bangor, and lies between the two mountain ranges of the Carneddau and the Glyderau. It stands at the head of the Nant Ffrancon Valley approx. four miles from the village of Bethesda.

Llyn Ogwen

Llyn OgwenLlyn Ogwen

The lake is surrounded by high mountains, including Pen yr Ole Wen and Tryfan, considered to be one of the finest mountains in Wales. Ogwen is an extremely shallow lake, with a depth of only three metres, and is around a mile long. It lies at a height of 310 metres above sea level. The lake is the source of the River Ogwen.

The route to the Glyderau from Llyn Ogwen commences from a footpath at the back of Ogwen Cottage, now a mountain rescue post and is a steep climb.

Left- The route up to the Glyderau from the back of Ogwen Cottage with Tryfan rising to the left. Right- Llyn Ogwen

The GlyderauLlyn Ogwen

Ancient legend links Llyn Ogwen with King Arthur, and it is said that the lake is the final resting place of his sword Excalibur.

In the early twentieth century a dam was constructed to raise the water level forming a reservoir. Due to its superb location, the lake is extremely popular. The A5 runs alongside it and there are several convenient car parks. There is a Youth Hostel, mountain rescue and snack bar at the western end of the lake. This is the only settlement in the valley and so small it isn't included on most maps.

The River Ogwen flows out of the western end of Llyn Ogwen and decends rapidly down a series of waterfalls and cataracts known as the Ogwen Falls or Rhaeadr Ogwen. From the falls the river flows on in a north, north westerly direction down to the Nant Francon Valley. As it continues on its course the Ogwen runs alongside the villages of Bethesda, Tregarth , Tal-y-Bont and Llandygai before arriving at the Menai Strait near Bangor.

A walk to Tryfan from Llyn Ogwen

Stay safe by following a few simple rules:-

The Glyderau

The Carneddau