Best lakes around Penrhyndeudraeth are situated within Snowdonia National Park, offering access to diverse aquatic landscapes. The area features both natural and man-made lakes, providing various outdoor activities. These lakes are set amidst woodlands, nature reserves, and mountainous terrain, characteristic of the Welsh landscape. Visitors can find opportunities for walking, cycling, and wild swimming in this region.
Last updated: May 22, 2026
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Popular around Penrhyndeudraeth
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Hiking around Penrhyndeudraeth
Llyn Dinas is a picturesque 24-hectare glacial lake in Eryri (Snowdonia) National Park in North Wales, near Beddgelert in the Nant Gwynant valley. It is a popular spot for scenic walks, wild trout fishing, paddleboarding, and swimming. The lake is relatively shallow (maximum 10 metres) and lies on the lower slopes near the Watkin Path to the summit of Snowdon.
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Situated just to the north of Beddgelert, and named after the nearby hill fort of Dinas Emrys, Llyn Dinas is a beautiful, peaceful lake perfect for a walk or even a swim.
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You'll find Llyn yr Adar's wild waters between the popular Cnicht, often cited as being the 'Welsh Matterhorn', and the less frequented Ysgafell Wen. The llyn is a useful navigational feature for those who've ascended Cnicht and are continuing to Moelwyns Mawr and Bach, or for those heading back to Croesor. It's also a great wild swimming spot and don't be surprised to see tents pitched by its shores either.
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A beautiful and secluded lake in the Moelwynion region. The banks of the lake are a relatively popular wild-camping spot, and the lake is a perfect spot to cool off and have a breather.
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Llyn Dinas is a large but shallow lake to the northeast of Beddgelert. The A498 road runs along its northern shore, while there are footpaths that explore its southern banks. Routes up Yr Wyddfa (Snowdon) from the mountain's southern side begin just to the northeast of the lake, including the Watkin Path, which is one of the most strenuous ways to the roof of Wales.
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The village of Trawsfynydd, on the banks of the artificial llyn of the same name, is a great basecamp slap bang in the middle of Eryri (Snowdonia) National Park. The trails of the Coed y Brenin Forest Park are nearby, while the Rhinogydd provide hillwalking of the highest quality. There's bunkhouse accommodation at the Cross Foxes pub, which also serves great food. The village and lake are known for the nearby nuclear power station, which is no longer operational. Amazingly, at one time, the power it generated was enough to provide all of Wales' electricity needs.
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Mountain lake. Plenty of space around the lake, with opportunities to find drinking water. Often used for wild camping.
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For walking and cycling, Llyn Trawsfynydd is an excellent choice. It features well-maintained cycleways and footpaths around its entire perimeter, offering opportunities to explore woodlands, nature reserves, and wetlands. The National Cycle Route 82 also runs along its eastern side. Llyn Dinas also offers picturesque settings for leisurely walks along its southern banks.
Yes, several lakes are suitable for families. Both Llyn Dinas and Llyn Trawsfynydd are noted as family-friendly. Llyn Trawsfynydd, with its flat cycleways and footpaths, is particularly good for families with children. The area around Maentwrog Dam also offers facilities and is considered family-friendly.
Llyn yr Adar, meaning 'Lake of the Birds', is a prime spot for wild swimming. Its wild waters and secluded location between Cnicht and Ysgafell Wen make it popular for those seeking a rugged outdoor experience. Glaslyn, located beneath the summit of Yr Wyddfa (Snowdon), is also celebrated for its stunning blue appearance and is popular for wild swimming, though it's a bit further afield.
The lakes around Penrhyndeudraeth are set within the diverse landscapes of Snowdonia National Park. You'll find woodlands, nature reserves, and wetlands, particularly around Llyn Trawsfynydd, which supports diverse animal and birdlife, including Atlantic oakwoods. Mountain views are prominent at lakes like Llyn Dinas, which is nestled near routes up Yr Wyddfa (Snowdon).
Yes, there are easy hiking options. The footpaths along the southern banks of Llyn Dinas are suitable for leisurely walks. For more easy hikes in the broader area, you can explore routes like the 'Borth-y-Gest – The Glaslyn Estuary loop from Porthmadog' or 'Porthmadog Harbour – Porthmadog Harbour Town loop from Porthmadog'. You can find more details on these and other easy hikes in the Easy hikes around Penrhyndeudraeth guide.
Beyond walking and cycling, the region offers a variety of outdoor activities. You can find running trails, such as the 'Moel-y-Gest & Borth-y-Gest loop from Porthmadog', detailed in the Running Trails around Penrhyndeudraeth guide. For more challenging adventures, mountain hikes are available, including routes near Llyn yr Adar, which serves as a navigational feature for hikers traversing between Cnicht and the Moelwyns. Explore these in the Mountain Hikes around Penrhyndeudraeth guide.
Yes, Llyn yr Adar is a popular spot for wild camping. It's not uncommon to see tents pitched along its shores, indicating its appeal for those seeking a more rugged outdoor experience in a secluded mountain setting.
Maentwrog Dam, built in the 1920s, was originally constructed to provide hydroelectric power for the Maentwrog power station. Later, in 1965, the lake it created also became a source of cooling water for the Trawsfynydd nuclear power station. Today, it's an interesting landmark and part of the cycling routes around the area.
Visitors frequently appreciate the stunning natural beauty and the diverse range of outdoor activities available. The picturesque settings of lakes like Llyn Dinas, the well-maintained trails around Llyn Trawsfynydd, and the wild, secluded feel of Llyn yr Adar are often highlighted. The opportunity for leisurely walks, cycling, and wild swimming amidst the breathtaking landscapes of Snowdonia is a major draw.
Yes, Llyn Trawsfynydd is a large man-made lake that was originally created to provide cooling water for a nuclear power station. Despite its industrial past, it is described as exceptionally beautiful. The nearby Maentwrog Dam also has a history tied to hydroelectric power generation.
The lakes are beautiful year-round, but for walking and cycling, spring and autumn offer pleasant temperatures and vibrant scenery. Summer is ideal for wild swimming. Even in winter, the landscapes can be stunning, though some trails might be more challenging due to weather conditions. Always check local weather forecasts before your visit.
While specific public transport routes to each lake can vary, Penrhyndeudraeth itself has public transport connections. From there, some lakes like Llyn Dinas are accessible via roads like the A498, which may have bus services. For more remote lakes like Llyn yr Adar, access often requires a hike from a parking area or village.


Still not found your perfect lake around Penrhyndeudraeth? Check out the guides of these regions to see even more beautiful places.