4.7
(51)
774
riders
17
rides
Touring cycling around Ystradgynlais offers routes through the Upper Tawe Valley and the southern edge of the Brecon Beacons National Park. The area features diverse landscapes, including hills like The Drum and Cribarth, and the Black Mountain range. Cyclists can explore routes along the River Tawe and through surrounding forests, encountering remnants of industrial heritage. The terrain combines tranquil natural beauty with varied elevation changes.
Last updated: April 24, 2026
4.4
(9)
95
riders
40.9km
02:29
230m
230m
Moderate bike ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
5.0
(1)
32
riders
56.3km
03:34
500m
500m
Hard bike ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

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18
riders
Hard bike ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
5.0
(1)
15
riders
31.0km
01:55
310m
310m
Moderate bike ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
15
riders
28.3km
02:12
440m
450m
Moderate bike ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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Low bridge - probably best to lower your saddle - or even better - walk your bike under this bridge
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NCN43 follows old railways lines, riverbanks and canals from Swansea to Clydach. This section follows an old railway line, it's flat and gravelled, easy riding but pretty and no cars.
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Riding the Sarn Helen from the start at Ynysygerwn is a technical climb. I would say probably not ride-able on an analogue bike but completely possible by EMTB.
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This section of NCN Route 43 takes you through woodland, alongside the river and along the the edge of Ystalyfera Natural Reserve.
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the entrance or exit to the roman road that runs the length of wales, this makes a fantastic end to a trail or an exciting beginning.
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The National Waterfront Museum is a treasure trove of history. The exhibitions take you through Wales' industrial history and innovation from the Industrial Revolution up until today. The museum is open daily from 10am until 5pm. Entrance is free, but you should book online prior to your visit. To book, visit: https://museum.wales/swansea/
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Ystradgynlais offers a diverse landscape for touring cyclists. You'll encounter river valleys, particularly along the River Tawe, forested paths, and the foothills of the Black Mountain range. The routes combine tranquil natural beauty with varied elevation changes, ranging from gentle riverside rides to more challenging ascents.
While the guide primarily features moderate to difficult routes, the region itself offers options suitable for families. The Swansea Valley route, part of the National Cycle Network (NCN), provides a traffic-free path ideal for leisurely rides. Additionally, former industrial sites like Diamond Park and Wern Plemys Nature Reserve have been regenerated into green spaces with peaceful cycling paths.
The area is rich in natural beauty. You can discover spectacular waterfalls like Henrhyd Falls, the highest waterfall in the Brecon Beacons, or Sgwd Gwladus Waterfall. The routes also offer views of significant peaks such as Fan Brycheiniog and Picws Du, and unique geological features like the Carreg Goch Limestone Outcrops.
Yes, many of the touring cycling routes around Ystradgynlais are designed as loops. For example, the River Tawe – Swansea Canal Towpath loop from Ystradgynlais is a popular moderate option, and the Forest Stream – Forest Cycle Path loop from Ystradgynlais takes you through forested areas.
The routes around Ystradgynlais cater to various abilities. This guide features nearly 20 touring cycling routes, with 11 rated as moderate and 7 as difficult. Moderate routes often follow riverside paths and canal towpaths with gentle inclines, while difficult routes, such as the Joe's Cafe – Clyne Locks loop from Ystradgynlais, include significant elevation changes and extend through varied landscapes.
Ystradgynlais is connected to the National Cycle Network (NCN), with Route 43 providing a green strip through the Swansea Valley, utilizing riverside paths, purpose-built sections, and old railway lines. This network can facilitate access to various cycling routes, often connecting to towns and villages with public transport links.
The area has a rich industrial heritage. You can see remnants of the past, such as the Ynyscedwyn Ironworks arches, offering a glimpse into the town's history. The region's landscape also features ancient standing stones like Maen Llia and Maen Madog, and the stone circle Cerrig Duon, adding a cultural dimension to your ride.
The touring cycling routes in Ystradgynlais are highly regarded by the komoot community, with an average score of 4.5 stars from over a dozen reviews. Cyclists often praise the varied terrain, from tranquil river paths to challenging mountain foothills, and the blend of natural beauty with intriguing industrial heritage.
Yes, some routes extend further afield, offering longer rides. For instance, the National Waterfront Museum – Swansea Canal Towpath loop from Ystradgynlais is a challenging 68.8 km route that takes you towards Swansea, showcasing a broader stretch of the region's landscape and industrial heritage.
The region is generally pleasant for cycling from spring through autumn. These seasons offer milder weather and better trail conditions. While some routes may be accessible in winter, it's advisable to check local weather forecasts and trail conditions, especially for higher elevation areas in the Brecon Beacons, which can be more exposed.
The mountainous surroundings of Ystradgynlais offer several excellent viewpoints. You can find panoramic vistas from summits like Fan Gyhirych Summit Trig Point and Fan Hir. The Black Mountain range itself provides dramatic backdrops and opportunities for stunning views of the Upper Tawe Valley.


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