Best lakes around Blaenrheidol are found within the Cambrian Mountains of Ceredigion, North Wales, offering diverse outdoor experiences. The area is characterized by its remote, wild mountain scenery and significant man-made reservoirs. These lakes are crucial for hydroelectric power generation and provide opportunities for recreation. The landscape features moorland, glacial formations, and historical sites.
Last updated: May 6, 2026
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Popular around Blaenrheidol
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MTB Trails around Blaenrheidol
Hiking around Blaenrheidol
Road Cycling Routes around Blaenrheidol

Gravel biking around Blaenrheidol
Built primarily to regulate the flow of water in the River Severn, the Clywedog Dam is an impressive sight. It's the tallest concrete dam in Britain, at 236 feet (72 m) high, while it's also 750 feet (230 m) wide. There are two marked hiking trails on the reservoir.
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Llyn Clywedog was the Tallest in the British Isle built purposely to control the level of water to help prevent any future flooding from the source of the River Seven. By Building this absolutely incredible huge 6 mile long dam, one that was the tallest in the British isles, which is amazingly huge in actual size all around! This mammoth body of water is solely to take the huge pressure off the constant mass of floods which would fill up and submerge the surrounding valleys! At the foot of the dam there is a remains of a old lead mine! All structures you can see standing still today. HIGHLY RECOMMEND
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Third highest summit in the Pumlumon range, Pen Pumlumon Llygad-bychan is perhaps most notable for its proximity to the source of the River Wye. To the north of the summit is the lovely pool of Llyn Llygad Rheidiol, while Pumlumon's principal summit is just a short walk along the Cambrian Way to the northeast. While the summit itself is not particularly distinguished and is known to be on the boggy side, it does offer lovely views across the Cambrian Mountains of Mid Wales.
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Pen Pumlumon Llygad-Bychan (727m, a Hewitt & Nuttall) is the third highest summit on the Plynlimon massif. The summit is boggy and marked by a few stones. The source of the River Wye, is just South of the summit. The picturesque glacial lake of Llyn Llygad Rheidiol lies to the North.
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A superb gravel ride. We did it on a mixed weather day as part of a larger 3 day tour and it was stunning in both directions. Well worth the hill climb to get to it if you start in Elan village. A great 2 day shorter trip could be from the reservoir (where there's parking), to the nearby bothy (around 9 miles along), then back the next day.
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Fast and flowing running almost along side the red trail back to the lake. Great to add on to the end as its a short climb back to the top for it.
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The most prominent lake directly within Blaenrheidol is the Nant-y-moch Reservoir, known for its scenic beauty and hydroelectric importance. Other significant lakes in the surrounding Cambrian Mountains include the remote Teifi Pools and Llyn Gynon. You can also see the impressive Clywedog Dam, which created Llyn Clywedog, and get views of the picturesque glacial lake of Llyn Llygad Rheidiol from Pen Pumlumon Llygad-Bychan summit.
Yes, the lakes around Blaenrheidol offer excellent walking and hiking opportunities. Nant-y-moch Reservoir has popular routes, including dog-friendly options, set amidst wonderful wild mountain scenery. The Teifi Pools area is perfect for long moorland hikes, forming part of the Cambrian Way. For more specific routes, you can explore various trails in the area, including those around Pumlumon, by checking out the hiking guide for Blaenrheidol.
Nant-y-moch Reservoir is well-known for its wild brown trout and perch, with fly fishing being a popular activity. The Teifi Pools are also renowned for wild brown trout. Llyn Gynon, a large natural lake, is recognized for its abundant, free-rising wild brown trout, especially during the June coch-y-bonddu beetle hatch.
Nant-y-moch Reservoir offers dog-friendly walking routes that are suitable for families to enjoy the scenic beauty. While the Teifi Pools and Llyn Gynon are more remote, they can be enjoyed by families seeking a wilder experience, provided they are prepared for rougher terrain. The Clywedog Dam also has marked hiking trails suitable for various abilities.
The region is characterized by wild mountain scenery, moorland, and glacial formations. Nant-y-moch Reservoir is set within the remote Cambrian Mountains. The Teifi Pools are surrounded by bleak moorland, sometimes called the 'Desert of Wales,' and feature glacial erratic stones. From Pen Pumlumon Llygad-Bychan summit, you can see the glacial lake of Llyn Llygad Rheidiol and panoramic views across the Cambrian Mountains.
The Cambrian Mountains offer beautiful scenery year-round, but spring and summer (May to September) generally provide the most favorable weather for walking, fishing, and enjoying the outdoors. June is particularly noted for fly fishing at Llyn Gynon due to insect hatches. Autumn brings vibrant colors, while winter can offer a stark, wild beauty, though conditions can be challenging with rough and boggy ground, especially at more remote locations like Llyn Gynon.
Nant-y-moch Reservoir has a large parking area by the dam, though visitors are advised against parking on grassy areas due to boggy conditions. Access to the Teifi Pools is via a winding single-track road that is relatively free of traffic. Llyn Gynon involves walking over rough and boggy ground to reach it, contributing to its wilderness appeal. Public transport options are limited, so driving is generally recommended for accessing these areas.
Nant-y-moch Reservoir has historical significance as a small village was submerged during its creation, with efforts made to relocate a local graveyard and ancient Iron Age cairns. The Teifi Pools area is part of the Cambrian Way long-distance path and features glacial erratic stones, remnants of the Ice Age. The nearby Strata Florida Abbey is also a significant historical site within accessible distance from the Teifi Pools.
Yes, there are cycling opportunities. While some areas are better suited for walking, you can find gravel tracks offering stunning views, such as the Elan Reservoir Gravel Track. For more dedicated cycling experiences, including mountain biking, you can explore the road cycling guide or the gravel biking guide for Blaenrheidol, which feature routes like the High as a Kite Red Trail and Barcud Bach Blue Trail.
The nearest village to Nant-y-moch Reservoir is Ponterwyd, where you can find amenities such as places to purchase fishing tickets. For more comprehensive services like cafes, pubs, and accommodation, you would typically need to visit larger nearby towns or villages. The more remote lakes like Teifi Pools and Llyn Gynon have very limited to no amenities directly nearby, so it's advisable to come prepared.
Absolutely. The Pumlumon Ridge, near Nant-y-moch Reservoir, offers wild and barren landscapes with panoramic views. The Pen Pumlumon Llygad-Bychan summit provides lovely views across the Cambrian Mountains of Mid Wales and of Llyn Llygad Rheidiol. The Clywedog Dam itself is an impressive sight, and the trails around Llyn Clywedog offer great vistas.
Yes, Nant-y-moch Reservoir offers dog-friendly walking routes. Generally, the wild and open nature of the Cambrian Mountains makes many areas suitable for dogs, but always ensure your dog is under control, especially around livestock or wildlife, and follow any local signage regarding dog access.


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