Comfortable 3 mile loop of Llyn Ogwen lake in Snowdonia National Park.

This has the least ascent of all the trail routes on our website at just 383ft, although the Pen Yr Ole Wen side of the lake has some boulders and boggy sections to cross.

Like our Llyn Idwal Loop, this trail is great for family members and friends who aren’t necessarily big walkers but like to get a real experience of the Welsh mountains.

Distance 3 miles

Time 1 hour 30 mins (walking) 30 mins (running)

Total Ascent 383ft

OS Maps click to open this route on the OS Maps website

Summits (none)

Views Ogwen Valley, the Glyderau, the Carneddau, Llyn Ogwen.


Llyn Ogwen Loop 3D Map



1. We like to start this route about halfway along the lake, where it’s possible to see pretty much the entire walk in all but absolutely dire weather. Heading towards Tryfan along the road, there’s a left hand turn over a bridge, passing a house and following the track up to a stile.


2. Shortly after the stile the path bears to the left and down to a picturesque footbridge over the stream. From here there’s a path to follow that snakes alongside the waters edge, crossing the odd boggy/wet section and a number of small boulder fields until it reaches the A5 road.


3. Before hopping over the A5 stile and heading back, we always head down to the left of the stile to check out the historic Roman bridge that still stands, preserved underneath the new main road with some staggeringly beautiful waterfalls. After this little treat it’s a simple case of hopping the stile and following the road to the left back to the car park.


Tryfan & Glyder Fach mountains reflected in Llyn Ogwen:



Y Garn mountain reflected in Llyn Ogwen:



Looking down at Llyn Ogwen from high up on Tryfan:


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