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Carmarthenshire

Top 9 Lakes in Carmarthenshire

Best lakes in Carmarthenshire are set within a landscape characterized by diverse natural features, from glacial valleys to expansive reservoirs. This region in Wales offers a variety of aquatic environments, including natural lakes, man-made reservoirs, and wetland areas. The geography supports a range of outdoor activities and provides habitats for wildlife. Its natural settings contribute to the area's appeal for those seeking outdoor exploration.

Best lakes in Carmarthenshire

  • The most popular lakes is Llyn y Fan Fach, a viewpoint…

Last updated: April 26, 2026

Picws Du summit & view of Llyn y Fan Fach

Highlight • Summit

Picws Du, or Bannau Sir Gaer, is the highest point of the dramatic escarpment high above Llyn y Fan Fach. Due to the remote and untouched landscape, you may have …

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Llyn y Fan Fach

Highlight • Viewpoint

Llyn y Fan Fach is a beautiful lake situated below the Black Mountain escarpment. You can reach the lake within short walking distance from the Llyn y Fan Fach car …

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Llyn Brianne Dam

Highlight • Viewpoint

Stunning spot and worth the extra few hundred metres detour if the plan is otherwise to simply ride around the reservoir.

You'll find brilliant gravel and forestry roads on one …

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WWT Llanelli Wetland Centre

Highlight • Viewpoint

Llanelli's wetland centre is a vast area of ponds, marshes and enclosures. There's plenty of amazing birdwatching to be had here, from native herons to Caribbean flamingoes calling the centre …

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Great place to canoe or SUP. Organised tours can be arranged or you can self-launch, with permission.

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Usk Reservoir

Highlight • Trail

A brilliant track around the reservoir. Doable on on most bikes with 35mm+ wheels.

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Llyn Llech Owain Country Park

Highlight • MTB Park

At the heart of the Country Park is a lake, surrounded by a peat bog.
Elsewhere are areas of heathland and broadleaved woodland. Facilities include a visitor centre, cafe and Mountain Bike and Tarmac / good quality bike trails.

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Llyn Llech Owain

Highlight (Segment) • Cycleway

It’s easy off-road ride, the lake and woodland is very interesting. New cafe opening sometime 2021

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Pond at Dinefwr Park

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The trail around the woodland passes an old ice-house and wooden sculptures and carvings hidden amongst the trees. As you leave the woods you reach the pond.

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Tips from the Community

Kinga
February 14, 2025, Picws Du Summit & View of Llyn y Fan Fach

https://hoofhike.com/

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Andy Bryant
February 4, 2025, Llyn Brianne Dam

A short climb up from the road brings you to the Dam and carpark, there is no access over the Dam itself. But you do get a good view over the spillway and valley below.

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Lovely cycle path. Nice pub on route just off of cycle path with good food but a little expensive. Route has nice views

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Picws Du is the second highest peak of the Carmarthen Fans in the Carmarthenshire section of the Black Mountain in the west of the Brecon Beacons National Park in south Wales.Picws Du is formed from the sandstones and mudstones of the Brownstones Formation of the Old Red Sandstone laid down during the Devonian period. Its summit and southern slopes are formed from the hard-wearing sandstones of the overlying Plateau Beds Formation which are of upper/late Devonian age.

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The lake is overlooked by several prominent mountain peaks, especially Picws Du and Waun Lefrith. Waun Lefrith is formed from the sandstones and mudstones of the Brownstones Formation of the Old Red Sandstone laid down during the Devonian period. Its southern slopes are formed from the hard-wearing sandstones of the overlying Plateau Beds Formation which are of upper/late Devonian age.

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Adie
November 28, 2022, Pond at Dinefwr Park

The trail around the woodland passes an old ice-house and wooden sculptures and carvings hidden amongst the trees. As you leave the woods you reach the pond.

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Tom
August 17, 2022, Llyn y Fan Fach

You're not supposed to swim in this one. Head to Llyn Y Fan Fawr instead: https://www.komoot.com/highlight/3218029

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Mark Burton
August 13, 2022, Usk Reservoir

A nice easy route for walking or riding, So glad the track across the dam is now open again, just have to keep your eyes open for the dog shit left all over the place.

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Frequently Asked Questions

What are the most scenic lakes for walking and views in Carmarthenshire?

For breathtaking scenery and views, Llyn y Fan Fach is highly recommended. Nestled beneath the Black Mountain escarpment, this glacial lake offers spectacular vistas, especially from the ridge of the Carmarthen Fans. Another popular spot is Llyn Brianne Dam, which provides stunning surroundings and is part of a vast reservoir ideal for enjoying peaceful forest scenery.

Are there any lakes in Carmarthenshire known for their historical or folklore significance?

Yes, Llyn y Fan Fach is steeped in folklore, famously associated with the legend of 'the Lady of the Lake.' Additionally, Talley Lakes have historical significance, with a Norman motte situated between the two lakes and the impressive remains of Talley Abbey overlooking the site, where monks once used the lakes for fish breeding.

Which lakes are best suited for family visits and activities?

Llyn Llech Owain Country Park is well-regarded for family visits and outdoor activities, featuring a lake surrounded by a peat bog, heathland, and woodland. The WWT Llanelli Wetland Centre, while not a single natural lake, offers a vast area of ponds and marshes perfect for family-friendly birdwatching and exploring diverse wildlife.

What kind of cycling opportunities are available around Carmarthenshire's lakes?

The area around Llyn Brianne is excellent for cycling, offering both brilliant gravel and forestry roads, as well as smooth tarmac, catering to different preferences. You can find various cycling routes in the region, including those featured in the Road Cycling Routes in Carmarthenshire guide and the Gravel Biking in Carmarthenshire guide.

Can I go wild swimming or do other water sports in Carmarthenshire's lakes?

Llyn y Fan Fach is considered an excellent spot for wild swimming. For other water sports, Swiss Valley Reservoir (Lower Lliedi Reservoir) is a great location for canoeing or stand-up paddleboarding (SUP). Organized tours can be arranged, or visitors can self-launch with permission.

Where can I go birdwatching around the lakes in Carmarthenshire?

The WWT Llanelli Wetland Centre is an exceptional spot for birdwatching, home to a variety of birds from native herons to Caribbean flamingos. Talley Lakes, protected as a nature reserve, also attract diverse bird species throughout the year, especially overwintering wildfowl and breeding birds.

Are there any lakes suitable for fishing in the region?

Yes, Sylen Lakes is particularly noted as a still-water fishery. It is well-stocked with bream, tench, and carp, including fish up to 20lbs, making it a popular destination for fishing enthusiasts.

What are the best times to visit Carmarthenshire's lakes for outdoor activities?

The best time to visit often depends on the activity. For hiking and enjoying the scenery, spring and summer offer pleasant weather and lush landscapes. Autumn provides stunning foliage. For stargazing, Llyn Brianne is recognized as a Dark Sky Discovery Site, making it ideal for clear nights year-round.

Are there accessible trails or facilities near the lakes?

Llyn y Fan Fach can be reached within a short walking distance from a car park, though it can get busy. Talley Lakes offer an accessible shoreline around the upper lake. For general accessibility, checking specific highlight details on komoot or local park websites is recommended.

What kind of wildlife can be observed around Carmarthenshire's lakes?

The lakes and surrounding areas are rich in wildlife. At Llyn y Fan Fach, you might spot red kites, common buzzards, kestrels, and ravens. Talley Lakes are home to diverse bird species, water beetles, and the emperor dragonfly. The WWT Llanelli Wetland Centre is specifically designed for observing a wide array of birds and wetland creatures.

Are there opportunities for stargazing near any of the lakes?

Yes, Llyn Brianne is recognized as a Dark Sky Discovery Site, making it an excellent location for stargazing due to its minimal light pollution and clear night skies.

What do visitors enjoy most about the lakes in Carmarthenshire?

Visitors frequently praise the stunning natural beauty and tranquility of the lakes. Many highlight the dramatic landscapes, the opportunity for peaceful walks, and the diverse outdoor activities available. The folklore surrounding places like Llyn y Fan Fach also adds a unique charm, and the well-maintained facilities at places like Llyn Llech Owain Country Park are appreciated by families.

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