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North Wales
Gwynedd

Barmouth

Top 18 Lakes around Barmouth

Best lakes around Barmouth are found in Gwynedd, North Wales, a region known for its diverse natural landscapes. The area features a mix of natural mountain lakes and artificial reservoirs, many nestled within the Cadair Idris mountain range or the Snowdonia National Park. These bodies of water contribute to the region's character, offering varied environments from high mountain pools to accessible lakeside paths. The landscape around Barmouth provides opportunities for exploring different types of aquatic environments.

Best lakes around Barmouth

  • The most popular lakes is Llyn Cau, a lake that is a high mountain pool watched over by the cliffs of Craig Cwm Amarch and Penygadair. Its spectacular colour is appreciated from above on the ridge.
  • Another must-see spot is Llyn Cynwch, a lake that acts as both a 'prequel' and 'sequel' to the Precipice Walk. It is a working water basin that has supplied drinking water for Dolgellau since 1968.
  • Visitors also love Cregennan Lakes, twin lakes owned by the National Trust, offering views down to Barmouth and its estuary. They are free to visit and are a photogenic spot.
  • Barmouth is known for high mountain lakes, artificial reservoirs, and moorland lakes. The area offers a variety of lakes to see and explore, from tranquil, remote spots to those integrated into popular walking routes.
  • The lakes around Barmouth are appreciated by the komoot community, with more than 150 upvotes and over 100 photos shared across various highlights.

Last updated: July 3, 2026

Llyn Cau

Highlight • Viewpoint

Llyn Cau has an ambience all of its own. This is a beautiful high mountain pool watched over by the frowning cliffs of Craig Cwm Amarch and Penygadair, Cadair Idris' main summit.

Like Snowdon's Glaslyn, legend tells of a terrifying serpent, the Afanc, in the depths of the water. It's easy to imagine serpents, dragons and giants in a landscape such as this, which is probably why Cadair Idris is so rich in myths and legends.

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Llyn Cynwch

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Llyn Cynwch acts as both a 'prequel' and 'sequel' to the Precipice Walk, one of the most famous and popular walks in the area with breathtaking views. You'll get a glimpse of the lake if you take the route counterclockwise and you'll see it in all its glory if you finish the walk with a nice, steady stroll along the banks.
Together with the Precipice Walk it is part of the historic Nannau estate and is a working water basin that has supplied drinking water for Dolgellau since 1968. Because it is a water basin, swimming is not allowed.
(DOLGELLAU.uk)

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Cregennan Lakes

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These twin lakes are particularly beautiful and lie just north of Cadair Idris. Both are owned by the National Trust and are free to visit. With mountains rising around them and views down to Barmouth and its estuary, don't leave your camera at home, because this is a fantastically photogenic spot.

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From Cwm Cau, the impressive pointed summit of Craig Cwm Amarch looks even mightier than Cadair Idris' main Penygadair summit. It is certainly the most airy summit in the massif and care must be taken when treading close to its cliff edge, which plunges down to Llyn Cau.

The summit is an exceptional viewpoint, with Penygadair to the north, the cwm below and the gentle green of the Tarren Hills to the south.

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Climb to Llynnoedd Cregennen from Arthog

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Very difficult climb - steep throughout, and in some places the legs and lungs will be begging for a break. That break comes with the need to go through a gate - something you won't have to worry about when you conquer the Cambrian Coast Sportive - and then another challenging finale past the yellow bin and waiting for you with coastal views towards Barmouth and the tranquility of Cregennen lakes.

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Tips from the Community

Dominiek Van Dooren
May 10, 2026, View of Llyn Cau from Craig Cwm Amarch

Craig Cwm Amarch is separated from Cadair Idris by a short, narrow ridge around Craig Cau, which encloses the beautiful lake Llyn Cau.

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Annja
August 31, 2025, Cregennan Lakes

First, a somewhat adventurous ride on the single track to the parking lot, which costs £5. The easy loop around the lake is very beautiful and relaxing – the sheep roam freely, but they keep their distance. Dogs must be on a leash, of course, but that's not a problem. Enjoy it – and if you're up for more, go for a longer loop. There are a few tables and benches above the parking lot for your picnic. You won't find any litter baskets, so you'll have to take them with you – which is perfectly fine, as it's a nature reserve. Highly recommended.

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take a little time, have a sit and let it soak in

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Mega Tough - At the top its worth it!

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A quieter peak compared to the Eryri hotspots with great views of Cardigan Bay.

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Zoe Evans
November 17, 2023, Llyn Cynwch

A circular walk through the historical Nannau estate and along the shore of Llyn Cynwch The Precipice has a fantastic array of qualities. From habitats such as woodlands and meadows to captivating views of Snowdonia’s mountain ranges. The path will take you through part of the Nannau estate which dates back to the 12th century and is steeped in fascinating Welsh history. The route ends on the shores of Llyn Cynwch—a working reservoir that provides nearby Dolgellau with water.

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Dominiek Van Dooren
September 23, 2023, Llyn Cynwch

Llyn Cynwch acts as both a 'prequel' and 'sequel' to the Precipice Walk, one of the most famous and popular walks in the area with breathtaking views. You'll get a glimpse of the lake if you take the route counterclockwise and you'll see it in all its glory if you finish the walk with a nice, steady stroll along the banks. Together with the Precipice Walk it is part of the historic Nannau estate and is a working water basin that has supplied drinking water for Dolgellau since 1968. Because it is a water basin, swimming is not allowed. (DOLGELLAU.uk)

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Seagulls on top of mountain looking for food.

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Frequently Asked Questions

What are some popular walking routes around the lakes near Barmouth?

Many lakes offer excellent walking opportunities. For instance, you can enjoy a circular walk around Llyn Trawsfynydd, known for its scenic landscapes. The area around Llyn Cynwch is integral to the famous Precipice Walk, offering breathtaking views. For a challenging but rewarding experience, consider the climb to Cregennan Lakes from Arthog, which also features waterfalls. You can find more hiking options in the Hiking around Barmouth guide.

Are there any challenging hikes around the lakes?

Yes, for those seeking a challenge, the climb to Cregennan Lakes from Arthog is described as very difficult and steep. Additionally, the route to Llyn Cau, a high mountain pool, involves challenging terrain within the Cadair Idris range. The Hiking around Barmouth guide also lists several difficult routes, including a 24.9 km loop from Barmouth to Cregennan Lakes.

What natural features and viewpoints can I find at the lakes?

The lakes offer diverse natural beauty. Llyn Cau is a stunning high mountain pool watched over by the cliffs of Craig Cwm Amarch and Penygadair, offering spectacular colors from above. Cregennan Lakes provide panoramic views of the Mawddach Estuary and Barmouth Bridge. Llyn Trawsfynydd boasts clear waters and breathtaking mountain views, while Llyn Cwm Bychan is a remote, rocky lake nestled in the rugged Rhinogydd mountains, especially beautiful when the heather is in bloom.

Are there any historical sites near the lakes?

Yes, the area around the lakes has historical significance. Llyn Trawsfynydd has a rich history, created between 1924 and 1928 for power generation, and visitors can explore the nearby Roman hill fort of Tomen y Mur. Llyn Cynwch is part of the historic Nannau estate. Llyn Irddyn also has evidence of Neolithic farmers and ancient field systems nearby.

Is there parking available at the lakes?

Yes, parking is available at some locations. Cregennan Lakes, for example, has a National Trust car park, making it very accessible. For more remote lakes like Llyn Cwm Bychan, access is via a very narrow, single-track road, which can be challenging during peak times.

When is the best time to visit the lakes near Barmouth?

The lakes can be enjoyed year-round, but each season offers a different experience. Spring and summer are ideal for walking and outdoor activities, with Llyn Cwm Bychan being particularly beautiful when the heather blooms. Autumn brings vibrant colors to the surrounding landscapes. While winter walks are possible, some areas might be more challenging due to weather conditions.

Are there family-friendly lakes or walks suitable for children?

Yes, several lakes are suitable for families. Cregennan Lakes are considered family-friendly and free to visit, with accessible paths. The walk around Llyn Cynwch is also described as a beautiful short walk for all abilities, making it suitable for families.

Can I go wild swimming in the lakes?

While some visitors might brave a swim in Llyn Cau, it's important to note that swimming is not permitted in Llyn Cynwch as it is a working water basin supplying drinking water for Dolgellau. Always check local regulations and safety advice before considering wild swimming in any lake.

What kind of wildlife can I expect to see around the lakes?

The lakes are rich in wildlife. Llyn Trawsfynydd is home to diverse waterfowl, and ospreys are occasionally spotted. The remote Llyn Cwm Bychan and Llyn Irddyn areas also support various bird species and local fauna due to their tranquil and less-crowded environments. The varied habitats around Llyn Cynwch, including woodlands and meadows, also attract different wildlife.

Are there opportunities for fishing in the lakes?

Yes, fishing is a popular activity in several lakes. Llyn Trawsfynydd is a haven for fishing enthusiasts, with natural wild brown trout, stocked rainbow trout, perch, rudd, and pike. Wild brown trout fishing is also possible in Llyn Cwm Bychan, and salmon and sewin can occasionally run into the lake via the River Artro. Cregennan Lakes are also known as a fishing spot.

What other outdoor activities are available near the lakes?

Beyond walking and hiking, Llyn Trawsfynydd offers water sports such as kayaking and windsurfing. The region around Barmouth is also excellent for road cycling, with routes like the 'Afon Mawddach loop' and longer rides to Harlech Castle. You can explore more options in the Road Cycling Routes around Barmouth guide.

Are there any hidden or tranquil lakes for a peaceful visit?

Yes, Llyn Irddyn is described as a serene, hidden gem, perfect for those seeking peace and quiet. It's a beautiful and empty spot, requiring a walk to access, which adds to its remote feel. Llyn Cwm Bychan, nestled in the rugged Rhinogydd mountains, is also less crowded than other parts of Snowdonia, offering tranquility for hikers.

What do visitors enjoy most about the lakes around Barmouth?

Visitors frequently praise the stunning views and photographic opportunities, especially at Cregennan Lakes and from viewpoints overlooking Llyn Cau. The tranquility and remote feel of places like Llyn Cwm Bychan and Llyn Irddyn are also highly valued. Many appreciate the diverse walking experiences, from easy strolls to challenging mountain ascents, and the rich folklore associated with the Cadair Idris range.

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

SnowdoniaBetws GarmonLlandygaiLlanllechidLlanberisLlanrugBeddgelertLlanllyfniLlanddeiniolenWaunfawrBethesdaLlandwrogPentirAberDolbenmaenFfestiniogLlanfrothenLlanfihangel-Y-PennantCorrisGanllwydDolgellauLlanelltydBrithdir And LlanfachrethMawddwyArthogBryn-CrugLlanwndaLlanegrynLlangelyninLlandderfelTrawsfynyddLlanuwchllynPennalDyffryn ArdudwyMaentwrogTalsarnauPorthmadogPenrhyndeudraethLlanbedrLlangywerLlanfairBontnewyddHarlechLlanycilY FelinheliCaernarfonBangorBalaClynnogTywynAberdoveyBala Lake

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