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Carneddau and Glyderau

Carneddau and Glyderau

Experience the wildest scenery that Snowdonia has to offer.


A 21,000-acre mountainous place, acquired in 1951 from the Penrhyn estate, includes the Cwm Idwal Nature Reserve renowned for its arctic alpine plants. There are eight tenant upland farms on this land, nine peaks above 3,000 feet and the famous mountain Tryfan where Edmund Hilary trained for his ascent of Everest.

The area is home to a variety of wildlife such as otters, water voles, feral ponies and rare birds such as dottrel and peregrine and the very rare Snowdon lily. The 100km of footpaths are popular with 500,000 walkers each year, and the bleak, photogenic, landscapes have proven popular with artists and painters. You’ll find over 1,000 archaeological sites here including seven scheduled ancient monuments.

In this open mountainous country, there are all levels of walks to suit most ages and abilities. Suggested walks by the National trust include:

Cwm Idwal walk – Suitable for much older children as the walk takes approximately 3 hours. Admire spectacular mountain views. It takes you into a normally inaccessible upland environment, and through beautiful ice-sculpted Cwm Idwal – a bowl-shaped hollow filled with the crystal clear waters of Llyn Idwal. The site is world famous for its rock formations and its rare and fragile plant life.

Llyn Ogwen circular walk – Taking between 1 to 2 hours depending on pace, enjoy superb views of Tryfan and the Glyderau and no hills to climb, this is a great way to experience the mountains without committing to a strenuous hike to the summits. 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.

Image shown is of Llyn Idwal which is a small lake lying within Cwm Idwal in the Glyderau mountains of Snowdonia.

Additional information:
*Car parking at Ogwen Lake (not National Trust).
*Other facilities at Ogwen lake – toilet, café and warden centre run by Snowdonia National Park, Access for Cwm Idwal here, just off A5
*Rough terrain, uneven paths, steep and narrow in places, stone-pitched paths, conditions influenced by weather.
*Please bring suitable footwear and clothing.

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