Top 7 Lakes around Llanidloes Without
Best lakes around Llanidloes Without are situated in a rural community in Mid-Wales, characterized by its natural landscapes. The area features Llyn Clywedog, a significant man-made reservoir, and is in proximity to several other notable bodies of water. These lakes offer diverse experiences, from scenic drives to hiking and wildlife observation. The region's geography includes upland lakes and reservoirs, contributing to its appeal for outdoor activities.
Best lakes around Llanidloes Without
- The most popular lakes is Llyn Llygad Rheidol,…
Last updated: June 30, 2026
Clywedog Dam
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Pen Pumlumon Llygad-Bychan summit
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Llyn Llygad Rheidol
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Llyn Clywedog Reservoir and Dam
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Llyn Mawr
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Popular around Llanidloes Without
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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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The centerpiece of the Llyn Mawr Nature Reserve is the upland lake known as Llyn Mawr, which means 'big lake' in Welsh. It supports a diverse array of aquatic plants including Bogbean, Yellow Water-lily and the rare Quillwort, found only in Montgomeryshire. Llyn Mawr is one of three lakes within a Site of Special Scientific Interest, situated high on the moorland plateau above the Carno Valley. At this spot you'll find a small boardwalk where you can enjoy close-up views of the lake.
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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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Nice climb up Pumlumon Fawr from this side.
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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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Llyn Clywedog is a man made reservoir built between 1965 and 1967 to help regulate the flow of water in the Severn. It's also used to reduce the risk of flooding up and downstream. Amusing comparison but the lake holds the equivalent of 264 billion glasses of water or 550 million baths. The area around the lake is a well kept habitat for many birds and animals including recent visits from ospreys. The lake is well stocked with trout and a popular fishing destination.
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Stunning view across the lake, sometimes you see fisherman
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Frequently Asked Questions
What are the main types of lakes found around Llanidloes Without?
The region features a mix of significant man-made reservoirs, natural upland lakes, and mountain lakes. The most prominent is Llyn Clywedog, a large man-made reservoir, alongside natural gems like Llyn Llygad Rheidol and Llyn Mawr.
Are there any impressive man-made structures associated with the lakes?
Yes, the Clywedog Dam, which created Llyn Clywedog, is a notable man-made structure. It stands as the tallest concrete dam in Britain, at 72 meters high and 230 meters wide, and was built to regulate the River Severn's flow.
What kind of wildlife can I expect to see around the lakes?
Llyn Clywedog is particularly known for its birdwatching opportunities. You can commonly spot buzzards and red kites, with ospreys and peregrine falcons also being regular visitors to the area.
Are there good opportunities for hiking or walking around the lakes?
Absolutely. Llyn Clywedog offers miles of footpaths, including two marked hiking trails around the reservoir. For more challenging routes, the area around Pen Pumlumon Llygad-Bychan summit, near Llyn Llygad Rheidol, provides rugged scenery and views across the Cambrian Mountains. You can find various running trails in the region, including moderate and difficult options, by exploring the Running Trails around Llanidloes Without guide.
Are there any family-friendly lakes or activities in the area?
Yes, Llyn Mawr, part of the Llyn Mawr Nature Reserve, is considered family-friendly. It features a small boardwalk for close-up views of the lake and its unique aquatic plants. The scenic drive around Llyn Clywedog also offers numerous viewing points and picnic areas suitable for families.
What are the options for cycling near the lakes?
The area around Llyn Clywedog is popular for cycling. There's a picturesque 15-mile circular drive around the lake, and Glaslyn Lake is visited by several classic bike routes, including the Trans-Cambrian Way. You can explore various cycling routes, including those around Llyn Clywedog, in the Cycling around Llanidloes Without guide.
Is there a lake known for its unique natural features or plant life?
Yes, Llyn Mawr is notable for its diverse array of aquatic plants, including Bogbean, Yellow Water-lily, and the rare Quillwort. It is one of three lakes within a Site of Special Scientific Interest, located high on the moorland plateau above the Carno Valley.
Can I find viewpoints with panoramic scenery near the lakes?
Certainly. The Pen Pumlumon Llygad-Bychan summit offers lovely views across the Cambrian Mountains of Mid Wales. Additionally, the 15-mile circular drive around Llyn Clywedog provides numerous viewing points to enjoy its panoramic scenery.
What is the historical significance of Llyn Clywedog?
Llyn Clywedog is historically significant as a man-made reservoir constructed between 1963 and 1967. It was built to regulate the flow of water in the River Severn and supply water to Birmingham and the English Midlands. Its creation involved flooding an agricultural valley, submerging several farms.
Are there any specific tips for visiting Llyn Clywedog?
Visitors often highlight the impressive scale of the Clywedog Dam itself. There are two marked hiking trails on the reservoir, and a scenic 15-mile circular drive offers many viewing points and picnic areas. It's also an excellent spot for birdwatching.
What do visitors enjoy most about the lakes around Llanidloes Without?
Visitors particularly appreciate the stunning natural landscapes, the opportunities for hiking and cycling, and the rich wildlife, especially birdwatching. The impressive scale of the Clywedog Dam and the serene, rugged beauty of lakes like Llyn Llygad Rheidol are frequently mentioned highlights.
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