Llyn Padarn is one of the largest natural lakes in North Wales, stretching for around 3 kilometres (2 miles) through the heart of Llanberis at the foot of Yr Wyddfa (Snowdon). Surrounded by mountains, ancient woodland and the dramatic slate landscape of Eryri (Snowdonia) National Park, it is one of the region’s most scenic places to relax, enjoy watersports or simply take in the views.
Formed by glaciers during the last Ice Age, the lake has played an important role in the history of Llanberis for centuries. During the height of the slate industry, it was used to transport slate from the nearby Dinorwig Quarry, helping establish the area as one of the world’s leading slate-producing regions. Today the surrounding quarry landscape forms part of the UNESCO World Heritage Site known as the Slate Landscape of Northwest Wales.
Unlike many mountain lakes, Llyn Padarn is easily accessible and offers something for visitors of all ages. Walking and cycling paths follow sections of the shoreline, while the clear waters are popular for kayaking, canoeing, paddleboarding and wild swimming. The lake is also well known for its excellent water quality and is home to the rare Arctic charr, a fish species that has survived here since the Ice Age.
The village of Llanberis occupies the southern end of the lake, making Llyn Padarn easy to combine with attractions such as the National Slate Museum, Dolbadarn Castle and the Snowdon Mountain Railway. Whether you’re preparing to climb Yr Wyddfa or simply looking for a peaceful place to spend an afternoon, the lake provides one of the finest settings in Eryri National Park.
Our recommendation: Allow time to walk along the lakeshore, particularly during the evening when the mountains are reflected in the calm water. Even if you’re only passing through Llanberis, Llyn Padarn is well worth stopping to enjoy.
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The Best Things to Do at Llyn Padarn
Llanberis Lake Railway
One of the best ways to experience the lake is on the Llanberis Lake Railway. The narrow-gauge heritage railway follows part of the former quarry railway along the eastern shore, passing woodland, lakeside scenery and views towards Yr Wyddfa. The journey also provides an insight into the area’s slate-mining heritage, making it both scenic and historically interesting.
Our recommendation: Combine the railway with a visit to the National Slate Museum, as both attractions are located at Gilfach Ddu and complement each other perfectly.
Official website: https://www.lake-railway.co.uk
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National Slate Museum
Located beside the southern shore of Llyn Padarn, the National Slate Museum occupies the former workshops of the vast Dinorwig Slate Quarry. Historic machinery, quarrymen’s workshops and demonstrations of traditional slate splitting tell the story of the industry that transformed Llanberis and much of North Wales. The museum also forms part of the UNESCO World Heritage Site known as the Slate Landscape of Northwest Wales.
Please note: The National Slate Museum is currently closed for a major redevelopment project. During the closure, some exhibitions and activities have moved to nearby locations as part of the Museum on the Move programme. Check the official website for the latest updates before travelling.
Official website: https://museum.wales/slate/
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Watersports
Llyn Padarn is one of the best places in North Wales for kayaking, canoeing and stand-up paddleboarding. The calm, clear waters are suitable for both beginners and experienced paddlers, while designated swimming areas make it a popular location for wild swimming during the warmer months.
Walking Around the Lake
Several easy walking routes follow sections of the shoreline, offering beautiful views across the lake towards Yr Wyddfa and the surrounding mountains. Benches, picnic areas and small beaches make it an enjoyable place to spend a relaxing few hours, while longer routes connect with Llanberis, Dolbadarn Castle and Padarn Country Park.
Dolbadarn Castle
Standing on a rocky outcrop above the lake, Dolbadarn Castle is one of the best-preserved native Welsh castles. Built by Llywelyn the Great during the early 13th century, its circular stone tower overlooks Llyn Padarn and provides some of the finest viewpoints in the area.
Official website: https://cadw.gov.wales/
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Our Recommendation
Llyn Padarn is best enjoyed at a slower pace than many of the surrounding mountain attractions. Spend time walking beside the lake, visit Dolbadarn Castle and the National Slate Museum, then take a ride on the Llanberis Lake Railway. Together they provide an excellent introduction to the natural beauty and industrial heritage of Llanberis without the effort of climbing Yr Wyddfa.