Best lakes around Trealaw are found within the surrounding Rhondda Cynon Taf region, offering diverse recreational opportunities. This area of South Wales features several notable lakes and reservoirs, many of which are former industrial sites regenerated into natural havens. These locations provide varied landscapes for outdoor activities and nature observation.
Last updated: June 30, 2026
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The water here is stunning in the sunlight. A good place to take a few moments to rest the legs.
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Dare Valley Country Park has a visitor centre and cafe, check opening times before relying on facilities.Dare Valley Country Park has a visitor centre and cafe, check opening times before relying on facilities.
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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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Dare Valley Country Park has a visitor centre and cafe, check opening times before relying on facilities. The paths can be wet and boggy at times, and if you're following the Penrhiwllech trail over the plateau of Tarren y Bwlfa, be aware of cliff edges!
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Cwm Clydach Countryside Park is an oasis of calm for wildlife with stunning views that has been created from the blackened scar of a coal mine. Walking alongside the lakes offers the chance to spot Kingfishers, herons, butterflies, newts and more. The two lakes are referred to as the “top lake” and “bottom lake” and there are also waterfalls. For refreshments, there is an on-site cafe.
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a lovely rocky descent or climb taking in views and forestry.
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For families, Pen-y-fan Pond is an excellent choice, offering safe, open areas for picnics and a unique 'Alien Invasion Trail'. Cwm Clydach Countryside Park also features easy circular walks and a Lakeside Café. Cwmbran Boating Lake is another great option with pedal boats, an adventure playground, and a skate park.
Llandegfedd Lake is a major hub for watersports, offering windsurfing, dinghy sailing, stand-up paddleboarding, canoeing, and kayaking. Equipment is available for hire at the site.
Yes, several lakes in the region have interesting histories. Lluest-wen Reservoir Dam Wall was constructed in 1898 and is known for a major leak in 1969. Pen-y-fan Pond is one of the last remaining canal feeder reservoirs in Wales. Additionally, Cwm Clydach Countryside Park and Dare Valley Country Park are built on former colliery sites, showcasing natural regeneration from industrial landscapes.
For easy walks, Cwm Clydach Countryside Park offers a circular route around its bottom lake, with further trails to a top lake. Pen-y-fan Pond also has a pleasant circular walk. Llwyn-on Reservoir features a tranquil 5 km circular walk suitable for most fitness levels. You can find more easy hiking routes in the area by visiting the Easy hikes around Trealaw guide.
The lakes are rich in wildlife. At Cwm Clydach Countryside Park, you might spot kingfishers, herons, butterflies, and newts. Llwyn-on Reservoir is an ideal habitat for otters, great crested grebes, goldeneye, goosanders, and coots. Llandegfedd Lake is a significant bird-watching site with over 240 recorded species.
Yes, Dare Valley Country Park provides extensive opportunities for cycling and mountain biking, including the Gravity Family Bike Park. You can explore various routes in the region through the Gravel biking around Trealaw guide.
Fishing is a popular activity. Llwyn-on Reservoir allows fishing for rainbow and wild brown trout with a day ticket. Llandegfedd Lake is heavily stocked with rainbow and brown trout and is known for holding the UK pike record. Fishing is also permitted at Pen-y-fan Pond with a day ticket, and at the Dare Valley Trout Fishery within Dare Valley Country Park.
Many lakes offer visitor facilities. Llwyn-on Reservoir has the nearby Garwnant Visitor Centre with toilets, a cafe, and outdoor play areas. Llandegfedd Lake features a modern visitor centre with a cafe. Cwm Clydach Countryside Park has a Lakeside Café, and Cwmbran Boating Lake also has an on-site cafe. Dare Valley Country Park includes a visitor center with a cafe, and even accommodation options.
Many country parks and lake areas in the region are dog-friendly, though specific rules may apply regarding leashes, especially in nature conservation areas or near livestock. It's always best to check local signage or park websites for the most current regulations for each specific lake or park you plan to visit.
The lakes can be enjoyed year-round. Spring and summer offer lush greenery, warmer weather for watersports, and vibrant wildlife. Autumn brings beautiful foliage, particularly around reservoirs like Nant Glydach Reservoir. Winter walks can be peaceful, but paths might be wet and boggy, especially at locations like Dare Valley Country Park. Always check weather conditions before your visit.
Llwyn-on Reservoir in the Brecon Beacons National Park offers a tranquil setting, ideal for peaceful walks and nature observation. Nant Glydach Reservoir is also described as a beautiful and serene place to visit, offering fantastic views.
Llwyn-on Reservoir has a unique sight: during dry spells, the ancient Pont ar Daf bridge emerges from the water. Cwm Clydach Countryside Park features not only two main lakes but also a 'secret' mini-lake and waterfall that appear after heavy rainfall.


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