Llyn Ogwen circular walk

Walking trail

Experience great views of Tryfan and the Glyderau mountains without committing to a strenuous hike up to the summits. Please note that the first half of the walk can be very wet and boggy, (especially in winter), whilst the second half returns along the main road.

Last resting place of Excalibur

Legends say that Bedwyr Bedrynant, a knight of King Arthur cast the famous sword Excalibur into the lake at Llyn Ogwen, where it remains to this day.

Llyn Ogwen, still waters, with the snow-capped peak of Y Garn, Snowdonia, Wales


Llyn Ogwen walking trail


Ogwen Cottage and Ranger Base, grid ref: SH 650603


From Ogwen Cottage, cross the main road and turn left, cross the bridge then turn right over the stile (gap in the wall).

Walkers heading towards Ogwen Cottage


Follow the river upstream to the lake by clambering over the large boulders, which can be quite challenging. It can be easy to lose the path here but keep heading for the lake and the path will become clearer with occasional way-markers.

Read more


Follow the lake-shore and the way-markers for ½ a mile before climbing a slight hill away from the lake, cross the stile and continue.

Read more
Climbers looking at the view of Llyn Owgen in the Ogwen Valley. Carneddau and Glyderau, Gwynedd.


As you approach the farmhouse at the end of the lake, cross another stile then bear left towards the footbridge and follow the upper path which avoids the farmyard then crosses a stile before dropping down to join the farm-track.


Follow this track away from the farmhouse until you reach the main road. Turn right and follow the pavement along the lake shore back to Ogwen Cottage.


Ogwen Cottage and Ranger Base, grid ref: SH 650603

You made it

Following this trail on mobile or tablet? Share your experience.

Llyn Ogwen circular walk


While the first section can be a little technical as you clamber over the large boulders at the bottom of Pen yr Ole Wen, the route soon becomes easier. However, there can be uneven ground, wet and boggy sections. The second half of the walk returns along the pavement of the main road. 

Llyn Ogwen circular walk

Contact us

Telephone: 01248 600954

Email: eryri@nationaltrust.org.uk

Website: http://www.nationaltrust.org.uk/carneddau-and-glyderau/

Llyn Ogwen circular walk

How to get here

Ogwen Cottage, Nant Ffrancon, Bethesda, LL57 3LZ
By road

From Bangor: Travel on the A55 then turn towards Bethesda along the A5 trunk road. Continue on A5 into the Nant Ffrancon Valley.

From Betws y Coed: Travel along the A5 to Capel Curig. Continue on A5 to Ogwen Lake.

By bus

Snowdon Sherpa buses run from Betws y Coed and Bangor to Ogwen car park. Pick up available from Capel Curig and Bethesda. For latest timetables please visit Gwynedd County Council.

Llyn Ogwen circular walk

Facilities and access

  • Toilets (not National Trust)
  • Infomation point
  • Parking (not National Trust)
  • Dogs welcome but must be on a lead at all times