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Carmarthenshire

Llanfair-Ar-Y-Bryn

Top 3 Lakes around Llanfair-Ar-Y-Bryn

Best lakes around Llanfair-Ar-Y-Bryn are found in Carmarthenshire, Wales, offering diverse natural beauty and recreational activities. The area features both man-made reservoirs and glacial lakes, set within the Cambrian Mountains and the Brecon Beacons National Park. These bodies of water provide settings for various outdoor pursuits.

Best lakes around Llanfair-Ar-Y-Bryn

  • The most popular lakes is Llyn Brianne Gravel Road, a cycle_way that snakes around the western shores of the Llyn Brianne Reservoir. This wide and easy gravel road is…

Last updated: October 3, 2026

Llyn Brianne Gravel Road

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The wide and easy gravel road snakes around the western shores of the Llyn Brianne Reservoir, which dates back to the late '60s to service Swansea and Neath.

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Llyn Brianne Dam

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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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Usk Reservoir Track

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Excellent track around the reservoir suitable for most bikes with gravel tyres.

The Usk Reservoir, also known as Cronfa Wysg in Welsh, sits at an elevation of 1,006 feet (307 …

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Usk Reservoir

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Usk Reservoir is a remote 280-acre reservoir below the Black Mountain. Popular for walking, cycling and the reservoir is regarded as offering the best still water trout fishing in Wales. …

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Popular around Llanfair-Ar-Y-Bryn

The Dragon's Back – running the spine of Wales

Road Cycling Routes around Llanfair-Ar-Y-Bryn

MTB Trails around Llanfair-Ar-Y-Bryn

Hiking around Llanfair-Ar-Y-Bryn

Cycling around Llanfair-Ar-Y-Bryn

Gravel biking around Llanfair-Ar-Y-Bryn

Running Trails around Llanfair-Ar-Y-Bryn

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The Dragon's Back – running the spine of Wales

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Jen & Sim Benson

Tips from the Community

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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Excellent track around the reservoir suitable for most bikes with gravel tyres. The Usk Reservoir, also known as Cronfa Wysg in Welsh, sits at an elevation of 1,006 feet (307 m) in the upper Usk Valley within the Brecon Beacons National ParK. It marks the county boundary between Carmarthenshire and Powys.

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Lovely mix of fire road to start with and then a huge climb up and over into a valley that time forgot - perfect single track - although can be a bit muddy in places. Probably best to make sure there has not been too much rain in the week before riding this route - and in the winter be prepared for quick changes of weather and plummeting temperatures.

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Adie
January 13, 2023, Usk Reservoir

Usk Reservoir is a remote 280-acre reservoir below the Black Mountain. Popular for walking, cycling and the reservoir is regarded as offering the best still water trout fishing in Wales. The best time to visit here is at sunset, when most people have headed home.

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Marcus
August 3, 2021, Llyn Brianne Dam

The road that snakes its way around Llyn Brianne Reservoir is spectacular and dizzying in equal measure

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Super fast gravel track around the west side of Llyn Brianne. Probably very scenic when the sun's out - fog & rain the day I did it!

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Really nice area. If the Hydro is working you get to see a spectacular water feature!

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Great views. Some good stopping points for a sandwich and even a beach. If you cross the dam going clockwise round the surface is gravel so be aware of bike and tyre choice for the whole ride around the lake. A lot of the gates are locked and you will need to lift bikes over them if you cross the dam. There were a lot of motorbikes in groups on the sunny day we went. Undulating Road with some long down hill sections and steep climbs adds to the enjoyment of the ride.

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Frequently Asked Questions

What types of outdoor activities can I enjoy around the lakes near Llanfair-Ar-Y-Bryn?

The lakes offer a wide range of outdoor activities. You can find excellent opportunities for walking, cycling, bird watching, fishing, and stargazing. For specific routes, explore the hiking routes or traffic-free bike rides available in the area.

Are there family-friendly walking routes around the lakes?

Yes, Usk Reservoir offers a particularly good option for families with its 8.7-kilometer (5.4-mile) waymarked circular route around the reservoir and across its dam. This path is suitable for both walking and cycling, providing an accessible and enjoyable experience for various ages and abilities. The path around Usk Reservoir is listed as family-friendly.

What are the best lakes for scenic views and photography?

Llyn Brianne is renowned for its dramatic hills, ancient forests, and breathtaking views, especially from the Llyn Brianne Dam. Llyn y Fan Fach, nestled within the Black Mountain range, also offers stunning vistas beneath its steep, flat-topped ridges, making both excellent choices for photography.

Can I go cycling around the lakes?

Absolutely. Llyn Brianne features both wide, easy gravel roads on its western shores, like the Llyn Brianne Gravel Road, and slick, smooth tarmac on the other side, catering to different cycling preferences. Usk Reservoir also has a well-maintained circular route suitable for cycling. You can find more options in the traffic-free bike rides guide.

Are there any unique natural features or landmarks to look out for?

Llyn Brianne is home to the UK's tallest dam, a 91-meter (300-foot) stone-built structure that is a notable attraction, especially when its spillway is active. The glacial lakes of Llyn y Fan Fach and Llyn y Fan Fawr are set within dramatic glacial topography, featuring rugged escarpments and open moorland, with Llyn y Fan Fawr being the source of the River Tawe.

What is the best time of year to visit the lakes?

The lakes are beautiful year-round, but the best time depends on your preferred activities. Spring and summer offer pleasant weather for hiking, cycling, and picnics. Autumn brings stunning foliage, while winter can provide a tranquil, stark beauty, though some trails might be more challenging. The area is also a Dark Sky Discovery Site, making it excellent for stargazing on clear nights throughout the year.

Are the lakes suitable for wild swimming?

Llyn y Fan Fawr is known as a popular spot for wild swimming, offering a refreshing experience amidst the stunning mountain scenery of the Black Mountain range. Always exercise caution and be aware of water conditions and temperatures when wild swimming.

Where can I find information about parking for lake walks?

Parking is generally available at key access points for the major lakes. For Llyn Brianne, you'll find parking areas around the reservoir, including near the dam. Usk Reservoir also has designated parking to access its circular route. Specific parking details are often signposted locally.

Are there any myths or legends associated with these lakes?

Yes, Llyn y Fan Fach is famously associated with the legend of the Lady of the Lake, a captivating Welsh folk tale. This adds a mythical allure to the already enchanting landscape, making a visit even more intriguing for those interested in local folklore.

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

The areas around the lakes are rich in wildlife. At Llyn Brianne, you can often spot red kites and buzzards soaring overhead. The remote settings of Usk Reservoir and the glacial lakes also provide habitats for various bird species and other local fauna, making them excellent spots for nature observation.

Are there any challenging hiking routes for experienced walkers?

For experienced walkers, the area around Llyn y Fan Fach and Llyn y Fan Fawr offers challenging full-day circular routes that encompass both lakes and the surrounding ridges of the Black Mountain. The ridge walk to Llyn y Fan Fawr, in particular, provides some of the most spectacular views in the Brecon Beacons.

Most popular routes around Llanfair-Ar-Y-Bryn

Road Cycling Routes around Llanfair-Ar-Y-Bryn

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