4.2
(49)
3,779
riders
141
rides
Road cycling around Mountain Ash East, situated in Rhondda Cynon Taf, offers diverse landscapes for cyclists. The area is characterized by mountainous terrain, dense forests, and significant river valleys, including the River Taff. Key cycling infrastructure includes sections of the Taff Trail and the Hengoed Viaduct, which is part of National Cycle Route 47. Several reservoirs, such as Llwyn-on, provide varied scenery and ascents.
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.
3.0
(2)
148
riders
52.6km
02:26
500m
500m
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.

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48
riders
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.
25
riders
42.0km
02:22
770m
770m
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.
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The road on the approach can be steep in places and beware of potholes.
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A challenging but rewarding climb, with pub at the bottom and a shop a quater of the way up, you steep out of the village, past the shop then it levels off before the climb again after half way it gets less steep but contunues to climb onto the moorland. Roadies follow the road, MTBs and gravel coninue up to the trig point for view of Cardiff and Sommeset beyong to the South and Bannau Brycheiniog to the North.
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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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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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Mountain Ash East offers a wide selection of road cycling routes, with over 145 options available. These routes cater to various skill levels, from easy rides to more challenging ascents.
The region is characterized by mountainous terrain, dense forests, and picturesque river valleys, including the River Taff. You'll find routes that incorporate sections of the Taff Trail and the historic Hengoed Viaduct, offering a mix of natural beauty and industrial heritage. Many routes feature smooth tarmac, but be prepared for varied elevation changes.
Road cycling in Mountain Ash East caters to all abilities. There are 14 easy routes perfect for a relaxed ride, 91 moderate routes for those seeking a good workout, and 40 difficult routes for experienced cyclists looking for a challenge. The komoot community rates the routes highly, with an average score of 4.3 stars.
Yes, many of the road cycling routes in Mountain Ash East are designed as loops, allowing you to start and finish in the same location. For example, the Smooth Tarmac Cycleway – Rhigos Climb Viewpoint loop from Cwmbach is a popular circular option offering great views.
You'll encounter diverse natural features and landmarks. Routes often pass through areas like St Gwynno Forest and along the River Taff. Notable attractions include the Llwyn-on Reservoir Dam, which is part of the Cwm Cadlan Nature Reserve – Llwyn-on Reservoir Dam loop from Mountain Ash. You might also spot various mountain peaks like Mynydd y Glyn Summit, offering scenic viewpoints.
Yes, some routes in the area incorporate natural attractions like waterfalls. For instance, the Waterfall Along Cycle Route – Smooth Climb to Pentyrch loop from Pentre-bach is a moderate route that specifically highlights a waterfall along its path, providing a scenic point of interest during your ride.
The region's diverse landscapes are enjoyable throughout much of the year. While specific seasonal considerations can vary, spring and autumn generally offer pleasant temperatures and vibrant scenery, making them ideal for road cycling. Summer can also be excellent, though some climbs might be more challenging in warmer weather.
While many routes involve significant elevation, there are easier sections and dedicated cycle paths suitable for families. The Taff Trail, which has sections suitable for road cycling, and the Hengoed Viaduct (part of National Cycle Route 47) offer relatively flatter and safer environments away from heavy traffic, making them good choices for family outings.
The area is highly rated by the komoot community, with an average score of 4.3 stars from over 40 reviews. Cyclists often praise the diverse landscapes, from challenging mountain climbs to serene reservoir views, and the well-maintained sections of cycle paths like those found on the Taff Trail and Hengoed Viaduct. The variety of routes ensures there's something for every skill level.
Absolutely. The region has a rich industrial history. The Hengoed Viaduct, now part of National Cycle Route 47, is a prime example of transformed industrial heritage offering a unique cycling experience. The Taff Trail itself allows for exploration of the area's industrial archaeological past, including remnants of old tramways, providing a fascinating backdrop to your ride.
Yes, Mountain Ash East is known for its mountainous terrain, providing ample opportunities for challenging climbs and exhilarating descents. Routes like the Smooth Tarmac Cycleway – Rhigos Climb Viewpoint loop from Cwmbach feature significant elevation gain, including views from the Rhigos Climb, making them popular among cyclists looking for a demanding ride.
Several routes in the area feature the region's beautiful reservoirs. The Cwm Cadlan Nature Reserve – Llwyn-on Reservoir Dam loop from Mountain Ash is a great example, leading you past the Llwyn-on Reservoir Dam. These routes often provide varied scenery and can include challenging ascents around the reservoir areas.


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