Llyn Idwal
Llyn Idwal: A Mountain Lake Steeped in Legend
Llyn Idwal is a breathtaking glacial lake set in the heart of Cwm Idwal, surrounded by the dramatic peaks of the Glyderau. Located within the Ogwen Valley in Snowdonia National Park, this iconic lake is renowned for its striking scenery, crystal-clear waters, and its connection to Welsh legend. Positioned at around 370 metres above sea level, Llyn Idwal is one of the most accessible and captivating mountain lakes in Snowdonia.
A Lake of Legend Beneath the Cliffs
Llyn Idwal’s tranquil waters are framed by rugged cliffs, including the famous Idwal Slabs, a favourite among rock climbers. The lake itself is often perfectly still, reflecting the jagged peaks of Y Garn, Glyder Fawr, and Tryfan. It’s a place where natural beauty and myth intertwine, as Llyn Idwal is said to be cursed after the tragic death of Prince Idwal. Today, the lake’s serene atmosphere makes it a popular spot for walkers, photographers, and anyone drawn to Snowdonia’s rugged charm.
© Brad Carr
Walks & Hikes Around Llyn Idwal
Llyn Idwal offers some of the most accessible yet dramatic landscapes in Snowdonia. From easy lakeside strolls to more rugged mountain adventures, here are some great walking routes in the area:
Book a Guided Hike on Llyn Idwal
Llyn Idwal Circular
- 2.5 mi
- 1.5 hrs - 2 hrs
A well-maintained path circles the lake, perfect for families or a gentle walk with iconic views of Tryfan and the Glyderau.
Devil’s Kitchen (Twll Du) and Llyn Idwal
- 3.5 mi
- 2 hrs - 3 hrs
Climb up the rocky path behind the lake to reach the dramatic cleft of Devil’s Kitchen, with views back over Llyn Idwal and beyond.
Llyn Idwal to Cwm Cneifion
- 4 mi
- 3 hrs
A steeper route leading above the lake into the hanging valley of Cwm Cneifion. Wild, remote, and perfect for adventurous walkers.
Idwal & Ogwen Valley Explorer
- 5 mi
- 3 hrs - 4 hrs
Start at Ogwen Cottage and loop around Llyn Idwal and parts of Llyn Ogwen, taking in wide views and glacial landscapes.
Idwal Slabs Scramble (Climbers' Path)
- 3 mi
- 2 hrs - 3 hrs
A more challenging, hands-on route up the famous slabs. Not for beginners but an iconic scramble for experienced hikers.
Why We Love Llyn Idwal
The weather around Llyn Idwal can change rapidly, so come prepared with waterproof clothing and sturdy boots. The paths around the lake can be rocky and slippery, especially after rain. Carry a map (OS Explorer OL17) and be mindful of your footing near the lake and on the trails. Swimming is not recommended due to the lake’s cold, deep waters.Why We Love Yr Wyddfa (Snowdon)
There’s something truly magical about standing on the roof of Wales. It’s not just the view, it’s the journey to the top, the sense of accomplishment, and the stories you collect along the way. Whether you’re hiking for the first time or making your annual pilgrimage, Yr Wyddfa leaves an impression that lasts long after you’ve left the summit.
How to Get to Llyn Idwal
Llyn Idwal is accessed from Ogwen Cottage (postcode: LL57 3LZ), located on the A5 between Bethesda and Capel Curig. There is a car park nearby, though it fills up quickly on weekends and holidays. Public transport options include buses from Bangor and Betws-y-Coed that stop at Ogwen Cottage.
A Bit of Llyn Idwal History
According to legend, Llyn Idwal is named after Prince Idwal, the son of Owain Gwynedd, one of Wales’ most powerful medieval rulers. The story tells that Idwal was tragically drowned in the lake, and ever since, it is said that no bird will sing near its shores. The area’s glacial origins have shaped the lake and the dramatic Cwm Idwal, creating one of the most iconic landscapes in Snowdonia.
Keep exploring
Llyn Idwal is just one of many remarkable lakes in Snowdonia. Ready for more mountain adventures? Check out our guides to nearby peaks and waterside trails!