Top 6 Lakes around Ystradgynlais
Best lakes around Ystradgynlais are found within the Brecon Beacons National Park, offering diverse natural landscapes. The area is characterized by glacial lakes like Llyn y Fan Fach and Llyn y Fan Fawr, set against the Black Mountain escarpment. Additionally, ornamental lakes are present within Craig-y-Nos Country Park. These locations provide opportunities for outdoor activities and are notable for their natural beauty and historical significance.
Best lakes around Ystradgynlais
- The most popular lakes is Llyn y Fan Fach, a viewpoint and natural monument situated below the Black Mountain escarpment. This glacial lake is known for its associated Welsh folklore legend of "the Lady of the Lake."
- Another must-see spot is Llyn y Fan Fawr, a natural monument and intermediate lake at the foot of Fan Brycheiniog. Visitors can expect a remote wilderness experience, with opportunities for challenging hikes and wild swimming.
- Visitors also love Craig-y-Nos Country Park and Castle, a lake area featuring 40 acres of Victorian gardens with ornamental lakes. This park offers gentle paths suitable for all ages and is recognized as a top site for stargazing.
- Ystradgynlais is known for glacial lakes, ornamental lakes, and lakes nestled below dramatic escarpments. The variety of lakes provides settings for hiking, wild swimming, and exploring historic gardens.
- The lakes around Ystradgynlais are appreciated by the komoot community, with more than 140 upvotes and over 70 photos shared by visitors.
Last updated: May 2, 2026
Fan Brycheiniog summit and stone shelter
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Picws Du summit & view of Llyn y Fan Fach
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Llyn y Fan Fach
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Llyn y Fan Fawr
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Craig-y-Nos Country Park and Castle
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There are a few other accommodation options in the surrounding area, making Craig-y-Nos an excellent base for exploring both the Black Mountain to the north and the Ogof Ffynnon Ddu Nature Reserve to the east. Closer by, the park’s gentle paths and picturesque lakes are a delight to explore.
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Tips from the Community
Tucked away in a dreamy, isolated location in the upper Swansea Valley, Craig-y-nos Country Park is a gorgouous 40-acre park that was once owned by Adelina Patti. Now it is a Victorian garden set in woodlands, surrounded by meadows and ponds, dissected by the River Tawe. It is in a gorgeous location, and there is a great cafe there to boot.
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The views down onto Llyn Y Fawr from here is pretty spectacular. This is one of the nicest places in the Brecon Beacons to walk along. Once you have put in the effort to get here, the ridge has a good footpath, there's a nice walled shelter and the views down towards the lake is pretty awesome on a good day.
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Ahhhh Llyn Y Fan Fawr, this glaciated lake is about the nicest place you can be on a hot summers day or even a cold winter's morning. It has been central to my working life in the hills for nearly forty years. It is just so perfectly locacted and makes for a good check point with groups, a rest spot, a camping spot and a perfect wild swimming spot on a hot day. Don't listen to the naysayers, this has been an iconic wild swimming spot for eons. Apart from that it will be a tad cold, it is just about one of the best swim spots in the Brecon Beacons.
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A quieter route that leads to the lake. Beautiful and challenging. ideal for all weathers.
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Fan Brycheiniog is the highest peak at a height of 802.5 metres in the Black Mountain region of the Brecon Beacons National Park in southern Wales. There is a trig point at the peak and on the edge of the escarpment, and nearby, a stone shelter with an inner seat.
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Fan Brycheiniog is the highest peak at a height of 802.5 metres in the Black Mountain region of the Brecon Beacons National Park in southern Wales. There is a trig point at the peak and on the edge of the escarpment, and nearby, a stone shelter with an inner seat.
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Llyn y Fan Fawr is a natural lake in the county of Powys, Wales. It lies at the foot of Fan Brycheiniog, the highest peak of the Black Mountain range within the Brecon Beacons National Park. Created as a result of glacial action, it is one of the largest glacial lakes in southern Wales. The lake is roughly rectangular in shape with its long axis oriented roughly north–south.
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Frequently Asked Questions
What kind of natural landscapes and views can I expect around the lakes near Ystradgynlais?
The lakes around Ystradgynlais are primarily glacial, nestled within the dramatic Black Mountain escarpment of the Brecon Beacons National Park. You can expect breathtaking views, especially from the ridges above lakes like Llyn y Fan Fach and Llyn y Fan Fawr. The landscape features dark, reflective waters, green hills, and sculpted valleys, with panoramic views that can extend to the Bristol Channel on clear days.
Are there any historical or cultural stories associated with the lakes?
Yes, Llyn y Fan Fach is famously associated with the Welsh folklore legend of 'the Lady of the Lake,' a romantic myth about a fairy princess. Additionally, Craig-y-Nos Country Park features ornamental lakes within 40 acres of Victorian gardens, once owned by the famous opera singer Adelina Patti, adding a touch of historical grandeur.
What outdoor activities can I do near the lakes?
The lakes offer a range of outdoor activities. Hiking is very popular, with routes around and above the lakes, including challenging ridge walks. Llyn y Fan Fawr is also a popular spot for wild swimming. For other activities, you can explore running trails, gravel biking routes, and road cycling routes in the wider Ystradgynlais area.
Are there family-friendly lakes or accessible trails for all abilities?
Yes, Craig-y-Nos Country Park is particularly family-friendly, offering gentle, easy-to-follow paths suitable for all ages and abilities, including those with prams or dogs. It also has a visitor center and a tea room. While the path to Llyn y Fan Fach is well-defined, it does have some steep sections.
When is the best time to visit the lakes near Ystradgynlais?
The lakes can be enjoyed year-round, but for the most pleasant hiking and outdoor activities, spring and summer offer milder weather and longer daylight hours. Autumn brings beautiful colors to the landscape. Winter hiking is possible, but conditions can be challenging, especially on higher ridges. Always check local weather forecasts before your visit.
Can I go wild swimming in any of the lakes?
Yes, Llyn y Fan Fawr is a popular and iconic spot for wild swimming. Unlike its smaller counterpart, it is not used for water supply, making it suitable for a refreshing dip on a warm day. Be aware that the water will be cold, even in summer.
What kind of wildlife can I spot around the lakes?
The remote and untouched landscapes around lakes like Llyn y Fan Fach offer opportunities to spot various birds, including red kites, common buzzards, kestrels, carrion crows, common ravens, and skylarks. The diverse habitats of Craig-y-Nos Country Park also support woodland flora, fungi, and a variety of birds and mini-beasts.
Are there places to eat or stay near the lakes?
While the glacial lakes like Llyn y Fan Fach and Llyn y Fan Fawr are quite remote with limited facilities, Craig-y-Nos Country Park has a visitor center and a tea room. The area around Craig-y-Nos also offers accommodation options, including the historic Craig-y-Nos Castle which is now a hotel, making it a good base for exploring the region.
Is parking available at the lakes?
There is a small car park available for visitors heading to Llyn y Fan Fach, though it can get busy. The road leading to it can be narrow and bumpy, so drive slowly. Craig-y-Nos Country Park also has parking facilities for visitors.
What makes the Black Mountain escarpment around these lakes special for hiking?
The Black Mountain escarpment, which cradles lakes like Llyn y Fan Fach and Llyn y Fan Fawr, is known for its dramatic glacial formations and offers excellent ridge walking. Peaks like Fan Brycheiniog and Picws Du provide challenging routes with spectacular panoramic views of the lakes and the wider Welsh countryside. The main route of the Beacons Way also runs along the ridge above Llyn y Fan Fawr.
Are there any less crowded lakes for a more secluded experience?
Llyn y Fan Fawr offers a more remote and isolated experience compared to Llyn y Fan Fach, which can get quite busy due to its easier access and folklore. If you're seeking challenging hikes and a true sense of wilderness, Llyn y Fan Fawr is an excellent choice.
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