Top 5 Lakes around Onllwyn
Best lakes around Onllwyn are situated within the broader region of Wales, including the Brecon Beacons National Park and "Waterfall Country." This area offers diverse natural landscapes and recreational opportunities for visitors. The region features both natural lakes and man-made reservoirs, providing various walking trails and viewpoints. These locations offer opportunities to explore historical sites and natural features near Onllwyn.
Best lakes around Onllwyn
- The most popular lakes is Craig-y-Nos Country Park and Castle, a lake that features a…
Last updated: August 24, 2026
Craig-y-Nos Country Park and Castle
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Lluest-wen Reservoir Dam Wall
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Gravel Roads by Lluest-Wen Reservoir and Wind Farm
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Great in the sun, but not so good with the wind in your face, it's an …
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View of Llyn Fawr from the Skyline Trail
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View of Bryn Gelli Reservoir and Wind Farm
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Tips from the Community
The water here is stunning in the sunlight. A good place to take a few moments to rest the legs.
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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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Craig Y nos Country Park, The Castle is surrounded by the Brecon Beacons mountains, it is also close to Henrhyd Waterfalls and backs on to Craig Y Nos Country Park where there are acres of fields to play in. We are described by many of our guests as the most dog friendly accommodation in Wales, if not the whole of the UK!! The Castle is well renowned' for being the Most Haunted Castle in UK 🇬🇧
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Lluest-wen Reservoir was constructed in 1898, but came to national attention in 1969 when a major leak caused an evacuation of residents down-valley while emergency repair work was carried out. Back in 1929 the place set a maximum daily rainfall record for Wales, with 211mm of rain recorded. You have been warned!
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The climb towards Bryn Llechwenddiddos and Bryn Gelli rewards you with great views of the reservoir.
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Lluest-wen Reservoir was constructed in 1898, but came to national attention in 1969 when a major leak caused an evacuation of residents down-valley while emergency repair work was carried out. Back in 1929 the place set a maximum daily rainfall record for Wales, with 211mm of rain recorded. You have been warned!
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Fun singletrack which breaks up the many km's on gravel firetrack road.
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Nestled on the banks of the River Tawe, this 40-acre (16 ha) Victorian country park is managed by the Brecon Beacons National Park authority and contains the Grade II-listed Craig-y-Nos Castle. The Castle was once owned by legendary opera singer Andelina Patti, today this impressive building is a hotel. 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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Frequently Asked Questions
Are there family-friendly lakes around Onllwyn?
Yes, several lakes in the region are suitable for families. Craig-y-Nos Country Park and Castle offers gentle paths and picturesque lakes within its 40-acre Victorian park. The lake at Dare Valley Country Park is also described as family-friendly, featuring a visitor centre and cafe.
What historical sites can I explore near the lakes?
The region offers several sites with historical significance. Craig-y-Nos Country Park and Castle includes a Grade II-listed castle once owned by opera singer Adelina Patti. Additionally, the Lluest-wen Reservoir Dam Wall, constructed in 1898, has a notable history, including a major leak in 1969 and a record for maximum daily rainfall in Wales in 1929.
Are there good walking trails around the lakes near Onllwyn?
Yes, the lakes around Onllwyn offer various walking opportunities. Craig-y-Nos Country Park provides gentle paths, while Lluest-wen Reservoir features a network of gravel forest roads ideal for walking. Talybont Reservoir in the Brecon Beacons also offers extensive trails for hiking. For more options, explore the easy hikes around Onllwyn guide.
Can I go cycling or gravel biking near the lakes?
Absolutely. The area around Lluest-wen Reservoir, particularly the Gravel Roads by Lluest-Wen Reservoir and Wind Farm, is known for its network of gravel forest roads, perfect for covering ground quickly and staying off tarmac. Talybont Reservoir also offers extensive trails suitable for cycling and mountain biking. You can find more routes in the gravel biking around Onllwyn guide.
Which lakes offer the best viewpoints?
For panoramic views, consider the View of Llyn Fawr from the Skyline Trail, which on a clear day can offer glimpses of Pen y Fan, the highest peak in the Brecon Beacons. The climb towards Bryn Llechwenddiddos and Bryn Gelli also rewards visitors with great views of the Bryn Gelli Reservoir and Wind Farm.
Are the lakes around Onllwyn dog-friendly?
Many areas around the lakes are dog-friendly. Craig-y-Nos Country Park is known for being very welcoming to dogs, with acres of fields to explore. Spring Valley Lakes near Glynneath is also highlighted as an excellent dog-friendly option for visitors with canine companions.
What natural features can I expect to see around the lakes?
The region surrounding Onllwyn is rich in natural beauty, situated within the Brecon Beacons National Park and 'Waterfall Country'. You'll encounter diverse landscapes including forests, moorland, and various water bodies. Highlights like Craig-y-Nos Country Park feature woodlands, meadows, and ponds, while the areas around Lluest-wen Reservoir offer expansive moorland scenery.
What is the best time of year to visit the lakes near Onllwyn?
The best time to visit depends on your preferred activities. Spring and summer offer pleasant weather for walking, cycling, and enjoying the lush greenery. Autumn brings beautiful foliage, while winter can provide a stark, dramatic landscape, though some paths may be wet or boggy. Always check local weather conditions before your visit.
Are there cafes or facilities near the lakes?
Yes, some lake locations offer amenities. Craig-y-Nos Country Park has a great cafe on-site. The lake at Dare Valley Country Park also includes a visitor centre and cafe, providing convenient facilities for visitors.
What makes Lluest-wen Reservoir unique?
Lluest-wen Reservoir is unique for its historical significance, having been constructed in 1898 and experiencing a major leak in 1969 that led to temporary evacuations. It also holds a record for the maximum daily rainfall in Wales in 1929. Additionally, the area features a network of gravel forest roads, making it popular for cycling and walking.
What other outdoor activities can I do near the lakes around Onllwyn?
Beyond walking and cycling, the region offers a variety of outdoor pursuits. You can explore extensive trails for mountain biking around Talybont Reservoir. The broader area, including 'Waterfall Country', is excellent for discovering numerous waterfalls. For more detailed routes, check out the cycling around Onllwyn guide and the gravel biking guide.
Are there challenging hiking routes around the lakes?
Yes, for those seeking more challenging hikes, the trails around Talybont Reservoir in the Brecon Beacons National Park offer extensive and sometimes demanding routes. The Skyline Trail overlooking Llyn Fawr also presents an intermediate challenge with rewarding views.
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