4.1
(42)
3,573
riders
138
rides
Road cycling around St Gwynno Forest offers a diverse landscape characterized by forested valleys, rolling hills, and open roads in the Rhondda Cynon Taf area. The region features a network of routes that navigate through woodlands and along scenic paths, providing varied terrain for road cyclists. Elevation changes are common, with many routes including climbs and descents. This area is well-suited for exploring the natural beauty of South Wales on two wheels.
Last updated: July 8, 2026
5.0
(2)
243
riders
92.6km
04:17
820m
820m
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.
41
riders
53.5km
02:31
510m
510m
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.

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24
riders
96.2km
04:18
790m
790m
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.
21
riders
38.3km
01:55
480m
480m
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.
19
riders
22.7km
00:58
150m
150m
Easy road ride. Great for any fitness level. Mostly well-paved surfaces and easy to ride.
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Nice picturesque reservoir with a great campsite just below it if you are on a bike or hiking tour.
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An epic road bike climb that not very difficult & has stunning views as you ascend
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Friendly cafe in high street, good coffee and crumpets ☕🤪
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Cefn-coed Viaduct was built in 1866 and is 770 ft (235 m) long and 120 ft (36.6 m) high. It is a rusticated-limestone structure of fifteen arches, set on a curve. The tall, slender piers and parapets are constructed with coursed irregular sized rock-faced limestone blocks
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The Cefn-coed Viaduct is the third-largest viaduct in Wales. This huge, curved structure once carried the Brecon and Merthyr Tydfil Junction Railway and is now part of the Taff Trail, which is Route 8 of the National Cycle Network that runs between Cardiff and Brecon. It offers walkers and cyclists a superb view of the Taf Fawr as it cascades over the many weirs in the valley
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Starting in the outskirts of Rhigos, this climb takes you past former mining areas and up to the top of Hirwaun Common. The climb passes the fomer Tower Colliery – which used to be the oldest working deep coal mine in the UK but closed in 2008. The climb gives both a feeling of industrial heritage but later the sweeping views of the Hirwaun Common. The first few km are fairly straight but near the summit, there are two switchback hairpins which add an alpine feel to this long-steady climb.
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A very pretty and accessible dam, the spillover makes it a lovely scenic addition to your loop of the reservoir or the nearby forest. There are lovely picnic areas on the way around the dam, some eating spots by way of a roadside 'scoff' van in a nearby lay-by on the eastern shore, and the cafe at Garwnant Visitor Centre on the north side of the reservoir.
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The St Gwynno Forest area offers a wide selection of road cycling routes, with over 140 options available on komoot. These routes cater to various skill levels, including easy, moderate, and challenging rides.
Yes, St Gwynno Forest has several easy road cycling routes. For a gentler ride, consider the Smooth Tarmac Cycleway loop from Aberaman, which is 14.1 miles (22.7 km) long with minimal elevation gain, making it ideal for those new to road cycling or looking for a relaxed outing.
For experienced road cyclists seeking a challenge, St Gwynno Forest offers routes with significant climbs. The Café Velo – Smooth Tarmac Cycleway loop from Cwmbach is a demanding 59.8 miles (96.2 km) route with over 790 meters of elevation gain, providing a substantial workout through varied terrain.
Yes, for those looking for longer rides, the region provides several extended routes. The Café Velo – Smooth Tarmac Cycleway loop from Cwmbach, at nearly 60 miles (96.2 km), is a great option for a full day out on the bike, exploring forested valleys and open roads.
Road cycling routes in St Gwynno Forest offer diverse scenery, including forested valleys, rolling hills, and open roads. Many routes feature impressive viewpoints, such as the Bryn Du Climb from Aberdare and the Blaenllechau Climb, which provide panoramic vistas. You can also find highlights like the View of the Brecon Beacons from St Gwynno Forest.
While specific cafes are not always directly on every route, some routes are designed to pass by or near popular cycling stops. For instance, the Café Velo – Smooth Tarmac Cycleway loop from Cwmbach explicitly mentions 'Café Velo' in its name, indicating a potential refreshment point along that particular journey.
Common starting points for road cycling routes in the St Gwynno Forest area include towns like Cwmbach and Mountain Ash. Many routes are designed as loops, such as the Smooth Tarmac Cycleway – Rhigos Climb Viewpoint loop from Cwmbach or the Cwm Cadlan Nature Reserve – Llwyn-on Reservoir Dam loop from Mountain Ash, allowing for convenient access and return to your vehicle.
The road cycling routes in St Gwynno Forest are highly regarded by the komoot community, holding an average rating of 4.2 stars from numerous reviews. Cyclists often praise the varied terrain, the scenic beauty of the forested valleys, and the well-maintained roads that make for an enjoyable riding experience.
Yes, many of the road cycling routes around St Gwynno Forest are designed as circular loops. This allows cyclists to start and finish at the same point, which is convenient for parking and logistics. Examples include the Smooth Tarmac Cycleway – Rhigos Climb Viewpoint loop from Cwmbach and the Cwm Cadlan Nature Reserve – Llwyn-on Reservoir Dam loop from Mountain Ash.
Beyond the scenic roads, the area offers natural attractions such as the Llanwonno Forest Trail, providing a deeper immersion into the woodlands. There's also a notable Waterfall highlight, offering a refreshing stop for cyclists.
The best time for road cycling in St Gwynno Forest is generally from spring through early autumn (April to October). During these months, the weather is typically milder, and the natural scenery is at its most vibrant. While winter cycling is possible, conditions can be more challenging due to colder temperatures and potentially wet or icy roads.
Yes, some routes offer the chance to explore local nature. The Cwm Cadlan Nature Reserve – Llwyn-on Reservoir Dam loop from Mountain Ash is a prime example, taking you through a nature reserve and around the picturesque Llwyn-on Reservoir, combining natural beauty with your ride.


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