4.6
(50)
538
riders
5
rides
Mountain biking around Claerwen National Nature Reserve offers routes through a remote and expansive landscape in Powys, Wales. The area is characterized by large reservoirs, significant dams, and vast open moorland, providing a rugged backdrop for outdoor activities. Riders can expect challenging ascents and descents across varied terrain, including open hills, woodlands, and bridleways, with views of the Claerwen and Elan Valleys. The trails often follow tracks and paths through this wild, upland environment, featuring diverse terrain from loose stones to technical sections.
Last updated: April 22, 2026
3.8
(5)
59
riders
Hard mountain bike ride. Very good fitness required. Suitable for all skill levels.
5.0
(1)
2
riders
55.8km
05:07
1,050m
1,050m
Hard mountain bike ride. Very good fitness required. Advanced riding skills necessary.

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5.0
(1)
3
riders
63.2km
05:53
1,300m
1,300m
Hard mountain bike ride. Very good fitness required. Advanced riding skills necessary.
2
riders
48.9km
04:34
900m
900m
Hard mountain bike ride. Very good fitness required. Advanced riding skills necessary.
1
riders
57.9km
05:23
1,250m
1,250m
Hard mountain bike ride. Very good fitness required. Suitable for all skill levels.
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Popular around Claerwen National Nature Reserve
Really amazing flat out and techy gravel riding
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Basic gift shop and toilets, along with a cafe.
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a place where you can learn a bit of Elan Valley history
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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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There are 6 mountain bike routes available in the Claerwen National Nature Reserve area on komoot. These routes cater to various skill levels, with 1 moderate and 5 difficult options.
The Claerwen National Nature Reserve area is known for its challenging terrain. While there are no routes specifically rated as 'easy' on komoot, the Sunken Road Near the Viaduct loop from Garreg Ddu Dam is a moderate 8.2-mile option that offers a less strenuous ride with scenic views of the dams and valleys.
For those seeking longer rides, the Claerwen National Nature Reserve offers several extensive routes. The Trans Cambrian Way and Claerwen Reservoir Loop is a challenging 39.3-mile trail, typically taking around 5 hours 53 minutes. Another significant option is the Claerddu River Crossing – View of Strata Florida loop from Claewen Dam, which covers 34.7 miles and usually takes about 5 hours 7 minutes.
Yes, many of the mountain bike routes in Claerwen National Nature Reserve are designed as loops. Examples include the popular Trans Cambrian Way and Claerwen Reservoir Loop, the Sunken Road Near the Viaduct loop from Garreg Ddu Dam, and the Caban-Coch Dam and Reservoir – Elan Valley Visitor Centre loop from Claewen Dam.
The terrain in Claerwen National Nature Reserve is varied and often challenging. Riders can expect a mix of tracks and paths through remote, expansive landscapes, including open moorland, significant dams, and large reservoirs. The routes feature challenging ascents and descents, characteristic of this wild, upland environment.
The area is highly rated by the komoot community, with an average score of 4.6 stars from over 50 reviews. Reviewers often praise the remote and expansive landscape, the challenging nature of the trails, and the stunning views of the Claerwen and Elan Valleys.
Absolutely. The majority of routes in Claerwen National Nature Reserve are rated as 'difficult'. Trails like the Trans Cambrian Way and Claerwen Reservoir Loop and the Trans Cambrian Way: Claerwen Reservoir Loop offer significant distances, elevation gains, and varied terrain, providing a true test for experienced mountain bikers.
The trails in Claerwen National Nature Reserve are renowned for their panoramic views. You'll encounter breathtaking vistas of the Claerwen and Elan Valleys, the expansive reservoirs, and the impressive dams. Many routes, such as the Sunken Road Near the Viaduct loop from Garreg Ddu Dam, offer excellent opportunities to appreciate the natural beauty of the area.
Given the predominantly difficult rating of the routes, Claerwen National Nature Reserve is generally more suited for experienced mountain bikers. However, families with older, more capable riders might find the moderate Sunken Road Near the Viaduct loop from Garreg Ddu Dam a suitable option for a less strenuous outing, offering scenic views without extreme technical challenges.
Due to the remote and exposed nature of the Claerwen National Nature Reserve, it's advisable to dress in layers, even in warmer months. Waterproof and windproof outer layers are recommended, as weather conditions can change rapidly. Sturdy mountain biking shoes, a helmet, gloves, and appropriate padding are essential for safety and comfort on the varied terrain.
The main attractions in the Claerwen area are the impressive reservoirs and dams themselves, which are central to many routes. The landscape also features remote river valleys and open moorland, offering a sense of wild beauty. While specific historical landmarks are less common directly on the trails, the natural features provide ample points of interest.


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