Around Llyn Idwal from Llyn Ogwen
Walk directions
The Cwm Idwal nature trail starts to the left of the Snack Bar at Ogwen, and climbs up the hillside to pass some impressive cascades. Ignore a narrower path left, just before the main path swings right.
Arriving at the foot of Llyn Idwal, turn left along its eastern shores. The clear footpath climbs into the dark shadows of Cwm Idwal.
Now you leave the nature trail, which forks right to complete a circuit around the lake. Instead ascend beneath the rock climbing grounds of the Idwal Slabs and across the stream of Nant Ifan, beyond which the footpath zigzags up rough boulder ground to the foot of Twll Du – the Devil’s Kitchen. If the the forecast is fine, climb to Llyn y Cwn at the top, if not, go to Point 6.
To ascend Twll Du climb the engineered path as it angles left up the rock face, which will now be on your right-hand side, above an extensive area of scree and boulder. At the top you come to a relatively gentle grassy hollow between the rising summits of Y Garn, to the right, and Glyder Fawr, to the left.
Just beyond the first grassy mounds you come across the small tarn of Llyn y Cwn – the Dog Lake – which makes a great picnic spot. Now retrace your steps carefully to the bottom of Twll Du
Among some huge boulders, the path forks and the left branch heads down to run above the western shore of Llyn Idwal, then rounds its northern end to meet the outward route at Point 2. The fork is easily missed; if you do this, continue down below the Idwal Slabs and turn left on the nature trail to round the lake. Now follow the route of your outward journey back to the car park at Ogwen.
Additional information
Terrain
- Well-defined paths, but very rocky around Twll Du
Landscape
- High mountain cwm
Dog friendliness
- Dogs should be on a lead
Parking
- Small pay car park at Ogwen (card or contactless only)
Toilets en route
- Next door to Ogwen Snack Bar
About the walk
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Been on this walk?
Send us photos or a comment about this route. Or recommend a route of your own.
Walking in Safety
Read our tips to look after yourself and the environment when following this walk.
Get an AA guide
Explore our range of ‘50 Walks in’ guides - they’re the ideal companion for a ramble.
About the area
The county of Gwynedd is home to most of the Snowdonia National Park – including the wettest spot in Britain, an arête running up to Snowdon’s summit that receives an average annual rainfall of 4,473mm. With its mighty peaks, rivers and strong Welsh heritage (it has the highest proportion of Welsh-speakers in all of Wales), it’s always been an extremely popular place to visit and live.
Nearby places to stay
View all (8)
Hotel
The Royal Victoria Hotel Snowdonia
★★★
"Impressive hotel in beautiful surroundings...."
- Family rooms: 5
- Free TV
- WiFi available
- Lift available
Caravan & Camping
Llys Derwen Caravan & Camping Site
★★★★
"The best of rural Wales close to Caernarfon...."
- Launderette
- Ice pack facility
- BBQ
- Battery Charging
Caravan & Camping
Bryn Gloch Caravan & Camping Park
★★★★
"Peaceful riverside park in the heart of Snowdonia...."
- Launderette
- Ice pack facility
- BBQ
- Picnic Area
Nearby places to stay
The Royal Victoria Hotel Snowdonia
The Royal Victoria Hotel Snowdonia is a well-established hotel near the foot of Snowdon, between the Peris and Padarn lakes. The mountains and extensive grounds make an attractive backd...
★★★ Rating
Llys Derwen Caravan & Camping Site
Enjoy the adventure of a lifetime in Snowdonia North Wales. Nestled in the scenic embrace of Mount Snowdon (Yr Wyddfa), the award winning Llys Derwen Caravan & Campsite Snowdon is an id...
★★★★ Rating
Bryn Gloch Caravan & Camping Park
Set beside the River Gwyrfai, Bryn Gloch offers shepherd's huts, static caravans and touring pitches in the heart of beautiful Snowdonia (Eryri). The park offers the best of two worlds,...
★★★★ Rating
Plas Gwyn Caravan & Camping Park
A secluded park in an ideal location for visiting the glorious nearby beaches, historic Caernarfon, the attractions of Snowdonia and for walking opportunities. The site is set within th...
★★★★ Rating
Riverside Camping
Set in the grounds of a former garden centre and enjoying a superb location along the River Seiont, Riverside Camping is approached by an impressive tree-lined drive. Immaculately maint...
★★★★ Rating
Royal Oak Hotel
Centrally situated in the village, the Royal Oak is an elegant, privately owned hotel that started life as a coaching inn and provides very comfortable bedrooms with smart, modern en su...
★★★★ Rating
Maenan Abbey
Maenan Abbey is a small, personally-run country house in a great location in Eryri National Park. Visitors can enjoy the huge amount of local attractions, walking and outdoor activities...
★★★ Rating
Bron Derw Touring Caravan Park
Bron Derw, once a dairy farm, is beautifully landscaped with stunning floral displays and is surrounded by hills. The park has been built to a very high standard and is fully matured. A...
★★★★★ Rating



