5.0
(6)
469
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13
rides
Road cycling around Claerwen Reservoir, situated within the Elan Valley in Mid Wales, offers routes through a landscape characterized by impressive man-made structures and rolling hills. The region features smooth tarmac roads and largely traffic-free reservoir roads, providing varied terrain for cyclists. These routes often follow gentle gradients, offering views of the valleys and the series of Victorian dams and reservoirs. The area's protected environment within the Cambrian Mountains provides a backdrop of open moorland and natural features.
Last updated: May 24, 2026
31
riders
22.2km
01:17
340m
340m
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.
91
riders
Hard road ride. Very good fitness required. Mostly well-paved surfaces and easy to ride.

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45
riders
110km
05:37
1,710m
1,710m
Hard road ride. Very good fitness required. Mostly well-paved surfaces and easy to ride.
44
riders
116km
06:34
1,770m
1,770m
Hard road ride. Very good fitness required. Some segments of this route may be unpaved and difficult to ride.
10
riders
59.2km
03:17
800m
800m
Moderate road ride. Good fitness required. Some segments of this route may be unpaved and difficult to ride.
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Beautiful church - well worth exploring
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The old church, along with the manor house and nearby cottages, were enveloped by the waters and lost forever when Caban Coch dam was built. Among the lost houses was Cwm Elan, once the home of poet Percy Bysshe Shelley's uncle. Shelley visited on several occasions and fell in love with the area. In 1812 he tried to buy Nantgwyllt House, as a home to settle into with his wife Harriet. The old church at Nantgwyllt may have been lost, but in 1898 a new church was begun on high ground overlooking the Garreg-ddu viaduct. The architect was Stephen W Williams, who also built Elan Village to house workmen labouring to build the dams. The new church was erected at the southern end of the viaduct.
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The Craig Goch Dam, often called the Top dam, is a masonry dam in the Elan Valley of Wales and creates the upper-most of the Elan Valley Reservoirs. Construction on the dam began in 1897, and it was completed in 1904. The primary purpose of the dam and the other reservoirs is to supply Birmingham with water. In 1997, a 480 kW hydroelectric generator began operation at the dam.
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The Elan dam scheme was developed in the 19th century following rapid growth of the population of Birmingham due to the Industrial Revolution. The city's expansion resulted in regular outbreaks of water-borne diseases and major epidemics such as typhoid, cholera and dysentery due to the lack of clean water.
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One of the most iconic reservoir created to provide water to Birmingham
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There are 14 road cycling routes around Claerwen Reservoir listed on komoot, offering a variety of experiences for cyclists. These routes range from moderate to difficult, providing options for different fitness levels.
While many routes around Claerwen Reservoir are moderate to difficult, the wider Elan Valley, which encompasses Claerwen, features the Elan Valley Trail. This 29km route is largely traffic-free with gentle gradients, making it accessible for families and novice cyclists. E-bikes are also well-suited for the gradual climbs, allowing less experienced riders to enjoy the scenery.
Road cycling routes around Claerwen Reservoir feature a mix of smooth tarmac and largely traffic-free reservoir roads. You can expect varied terrain with rolling hills and gentle gradients, often following the line of the old Birmingham Corporation Railway. While some routes are moderate, others, like the Craig Goch Dam – Elan Valley Reservoirs loop from Elan Valley Visitor Center, involve significant elevation gains, reaching over 1700 meters of ascent.
The region is defined by its impressive Victorian dams and reservoirs. You'll encounter the magnificent Claerwen Dam, the largest and newest in the Elan Valley, offering breathtaking views. Other notable dams include Craig Goch Dam, which is part of routes like the Claerwen Dam – Craig Goch Dam loop from Elan Valley Visitor Center. The routes also provide sweeping views of rugged mountains, rolling hills, and vast open moorland within the Cambrian Mountains.
The Elan Valley Visitor Centre, located near Caban Coch Reservoir, is a key facility in the area and offers parking. This is a convenient starting point for many routes, including the Claerwen Dam – Elan Valley Reservoirs loop from Elan Valley Visitor Center.
The region is quite remote, and public transport options directly to Claerwen Reservoir are limited. It is generally recommended to travel by car or arrange private transport to reach the starting points of the cycling routes, such as the Elan Valley Visitor Centre.
The Elan Valley offers beautiful cycling experiences throughout the year. Spring and autumn provide pleasant temperatures and stunning scenery with changing foliage. Summer is ideal for longer days and warmer weather, while winter can offer dramatic views, especially when the reservoirs are full and excess water cascades over the dams. Always check local weather forecasts before heading out.
Yes, the Elan Valley Visitor Centre, situated near Caban Coch Reservoir, provides essential facilities. Here you can find cafes, toilets, and bike hire services, including e-bikes and children's bikes, making it a convenient stop before or after your ride.
The area is highly rated by the komoot community, with an average score of 5.0 stars from 5 reviews. Cyclists often praise the stunning landscapes, the largely traffic-free reservoir roads, and the impressive Victorian dams. The peaceful atmosphere and immersion in nature are also frequently highlighted.
Yes, many of the routes around Claerwen Reservoir are designed as loops. For instance, the Craig Goch Dam – Elan Valley Reservoirs loop from Llannerch y Cawr is a popular circular route that allows you to experience the area's beauty without retracing your steps.
The Elan Valley is rich in wildlife. Cyclists might spot red kites soaring overhead, otters in the waterways, and various fish species. The area is also renowned for its birdlife, with over 180 species recorded, including merlins, hawfinches, and buzzards, especially in the untouched wilderness and open moorland.
Absolutely. For experienced cyclists seeking a challenge, routes like the Claerwen Dam – 49er Hill Climb loop from Elan Village cover over 115 kilometers with significant elevation, providing a demanding yet rewarding experience through the valley's diverse terrain.


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