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Rhayader

Top 15 Lakes around Rhayader

Best lakes around Rhayader are primarily the impressive reservoirs of the Elan Valley, often referred to as the "Welsh Lake District". These man-made structures were constructed to supply water to Birmingham, offering a blend of engineering history and natural scenery. The area features a series of large reservoirs like Caban Coch, Garreg Ddu, Pen-y-Garreg, Craig Goch, and Claerwen. Visitors can explore a variety of landscapes, from dam structures to open moorland.

Best lakes around Rhayader

  • The most popular lakes is Caban-Coch Dam and Reservoir, a man-made structure known for its elegant design. This dam is the lowest in the Elan Valley and was the first to be constructed.
  • Another must-see spot is Gravel Path Along Claerwen Reservoir, a viewpoint and trail. This path leads along the largest and newest of the Elan Valley Reservoirs, offering views over the expansive lake.
  • Visitors also love Pen-y-Garreg Dam, a viewpoint and man-made monument. This dam is notable for its central valve tower and an access tunnel through its center, which visitors can explore.
  • Rhayader is known for its large man-made reservoirs and the extensive Elan Valley Trail. The area offers a variety of water bodies and scenic routes for exploration.
  • The lakes around Rhayader are appreciated by the komoot community, with 99 upvotes and 24 photos shared across various highlights.

Last updated: May 2, 2026

Caban-Coch Dam and Reservoir

Highlight • Structure

The Caban-Coch Reservoir is one of four reservoirs in the Elan Valley Reservoirs, which supply the city of Birmingham in particular with drinking water. This one is the second largest and its dam is quite impressive.

The cycle path goes to the right of the lakeshore and there is a small rest area at the top. Here you can relax a bit and watch the large water surface or admire the dam. Swimming is unfortunately not allowed, and would be no fun anyway, as the shore is hardly accessible.

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The Claerwen Reservoir is the largest and the newest of the four Elan Valley Reservoirs. Once you reach the top, another "wow“ experience awaits you!

The view over the huge lake is simply breathtaking. And the best: A really nice gravel path leads along it. Without any traffic, without people, without cell phone network. Here you have your peace.

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Pen-y-Garreg Dam

Highlight • Viewpoint

Elan Valley - Pen-y-Garreg Dam
The Pen-y-Garreg is the third Dam up through the Elan Valley, also to be known as the 'Middle Dam'.
Pen-y-Garreg Dam is unusual in that it houses an access tunnel to the central tower which is lit by apertures in the downstream side of the dam.
The viaduct at Garreg Ddu further downstream does not resemble the other dams since the dam part of the structure is not visible above the water surface in normal conditions. There are atotal of four dams on the river Elan;.
Craig Goch.
Pen-y-Garreg.
Garreg-Ddu.
Caban Coch.

The river Claerwen has the newest and largest, Claerwen Dam followed by the unfinished Dol y Mynach dam.
With the exception of Dol y Mynach all the dams are also accessible by car.

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Elan Valley Trail

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The Elan Valley is one of the most picturesque areas of Wales. Known as the "Welsh Lake District" the area of beautiful countryside and lakes spans over 70 square miles (181 square km). The Elan Valley Trail is a popular cycle trail that leads from Rhayader around the reservoirs in the valley.

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Elan Reservoir Gravel Track

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Great gravel track with stunning views of the reservoirs. It's busiest closest to the visitor centre as expected!

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Tips from the Community

jaywaldon
July 8, 2025, Elan Valley Trail

Lovely sweeping valley

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A good way into the valley. A flat out gravel surface that winds around the dams for miles

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one of my favorite cycling places

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cycling paradise for everyone

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Elan Valley is a mountain bikers dream. A mix of natural trails that follow the reservoirs and crest the lofty tops of each valley. There's also a great trailhead in the middle of the valley at Nantgwyllt for some great flowing singletrack.

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Pen y Garreg Dam third of the Elan Valley Dams, also known as the middle dam. This dam houses an access tunnel to the central tower which is lit by apertures in the downstream side of the dam. Height - 123 ft above river bed. Beautiful scenery a great ride around this area.

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Rough and ready along the side here

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Andy
July 20, 2023, Elan Valley Trail

A very scenic cycle path around the reservoir

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Frequently Asked Questions

Which reservoirs in the Elan Valley are particularly worth visiting?

The Elan Valley offers several impressive reservoirs, each with unique features. Caban-Coch Dam and Reservoir is known for its elegant design and dramatic overflow when full, making it a great starting point near the visitor centre. Pen-y-Garreg Dam is unique for its central valve tower and an access tunnel through its center that visitors can explore. The Claerwen Reservoir is the largest and newest, offering vast open moorland views and excellent hiking opportunities.

What is the historical significance of the Elan Valley reservoirs?

The Elan Valley reservoirs were constructed primarily to supply clean drinking water to Birmingham, England. This massive Victorian engineering project transformed the landscape. Notable historical aspects include the submerged Garreg Ddu dam, which acts more like a bridge, and the nearby ruins of the Nant-y-Gro dam, which was used for Dambusters experiments during WWII.

Are there family-friendly activities around the Elan Valley lakes?

Yes, the Elan Valley is very family-friendly. Many trails are suitable for all ages, such as sections of the Elan Valley Trail. Exploring the access tunnel within Pen-y-Garreg Dam offers a fascinating glimpse into Victorian engineering. The area also provides opportunities for cycling, birdwatching, and stargazing, being an International Dark Sky Park.

What outdoor activities can I do near the Elan Valley reservoirs?

The Elan Valley is a hub for outdoor activities. You can enjoy extensive cycling on routes like the Elan Valley Trail, which is popular for gravel biking. There are also numerous running and mountain biking trails. For example, you can find challenging MTB routes like the 'Elan Valley loop' or 'Puke Hill – Claerddu River Crossing loop' in the MTB Trails around Rhayader guide, and running routes such as the 'Garreg Ddu to Craig Goch running loop' in the Running Trails around Rhayader guide.

When is the best time to visit the Elan Valley reservoirs?

The best time to visit is often in late winter and early spring, especially after heavy rainfall. During these periods, the reservoirs are full, and the dams are in full flow, creating spectacular cascading waterfalls over the spillways. The scenery is picturesque year-round, but the dams are most dramatic when overflowing.

Are there good walking trails around the reservoirs?

Absolutely. The Elan Valley offers a variety of walking trails for all abilities. You can find walks around individual reservoirs, such as the 'Around Caban Bike Trail' or 'Nant y Gro Walk' near Caban Coch. The Elan Valley Trail itself provides a long, scenic route suitable for walking and cycling, offering views of multiple reservoirs.

Can I cycle around the Elan Valley reservoirs?

Yes, cycling is a very popular activity in the Elan Valley. The Elan Valley Trail is a dedicated cycle path that leads around the reservoirs from Rhayader. The Elan Reservoir Gravel Track is also highly rated for its stunning views. You can find various gravel biking routes, including the 'Caban-Coch Dam and Reservoir – Elan Valley Reservoirs loop' in the Gravel biking around Rhayader guide.

What makes Craig Goch Reservoir special?

Craig Goch, often called the 'top dam,' is widely considered the most beautiful of the Elan Valley dams. It's the highest reservoir, situated over 1,000 feet above sea level, and is admired for its elegantly curved wall and the arched viaduct that carries a roadway across its top. It offers stunning panoramic views and is a popular spot for photography, especially at sunset.

What unique features does Garreg Ddu Reservoir have?

Garreg Ddu is unique because its dam is largely submerged, appearing more like a bridge with a viaduct carrying a road across it. This design helps maintain a consistent water level for the Elan Valley Aqueduct. Its distinctive appearance is particularly striking when water levels are low enough to reveal more of its structure, and the nearby Foel Tower marks where water extraction for Birmingham begins.

Is the Elan Valley a good place for stargazing?

Yes, the Elan Valley is designated as an International Dark Sky Park. This means it has exceptionally dark night skies, making it an excellent location for stargazing and enjoying astronomical phenomena away from light pollution.

What do visitors enjoy most about the Elan Valley reservoirs?

Visitors frequently praise the stunning natural beauty and the impressive engineering of the dams. Many highlight the peaceful atmosphere, the excellent cycling and walking opportunities, and the dramatic views, especially when the reservoirs are full and overflowing. The sheer scale of the landscape and the sense of being 'a million miles away' are often mentioned.

Are there any specific viewpoints I should visit in the Elan Valley?

Beyond the dams themselves, which offer fantastic views, the Gravel Path Along Claerwen Reservoir provides breathtaking views over the expansive lake. The summit of Craig Goch also offers panoramic vistas of the entire Elan Valley. Many trails, like the Elan Reservoir Gravel Track, are noted for their stunning views of the reservoirs.

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