4.4
(258)
2,407
hikers
188
hikes
Hiking around Mountain Ash East offers varied landscapes characterized by valley terrain, rivers, and forests. The area features notable natural elements such as waterfalls and quarries, alongside a rich industrial heritage. Trails often follow river courses and ascend to viewpoints, providing a blend of natural beauty and historical interest.
Last updated: April 27, 2026
4.3
(9)
34
hikers
6.99km
01:58
150m
150m
Hike the easy 4.3-mile Giant's Bite and Taff Trail Loop, featuring river views, historical bridges, and panoramic vistas from the Giant's Bi
4.7
(3)
10
hikers
14.6km
04:26
470m
470m
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.

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5.0
(2)
11
hikers
11.5km
03:02
110m
110m
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.
5.0
(1)
10
hikers
8.29km
02:12
80m
80m
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.
5
hikers
17.1km
04:52
380m
380m
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.
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Exiting the Western arm of the Taff trail to join up with the eastern unpaved side, you are met with a steep drop off down a service tunnel. Cute stone arch bridge at the bottom and then another wall up to the Trevithick trail, though thankfully, you don't have to go all the way up. Having done a few of these valley cycle paths now, I can say this was the worst...so far.
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Absolutely loved the Taff Trail and it's contrasting scenery, starting in the mountains and Reservoirs of the Brecon Beacons through the working towns of the valleys and into the urban streets of Cardiff City. Fantastic contrast of landscapes industrial past and present. This trail is a must visit if you are in the area.
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While on the Taff Trail the viaduct suddenly looms out of the trees, another fantastic example of the amazing construction skills of our industrial past, take a moment to stop and have a proper look.
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Gillies Trail and Waterfall in Caegarw, Mountain Ash. Not many people are aware of the path that leads up to the mountain behind Caegarw and the impressive waterfall that is only a short 10 minute walk from the start of the trail. The path is accompanied by a beautiful river which follows alongside for a good part of the trial and there is a fair share of wildlife to spot too! If you’re looking for a new place to visit in Mountain Ash or a place to go with your dogs off the lead, this is ideal!
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known as the "Giant's Bite" is a large quarry on the summit of Daren y Celyn (Holly Ridge). The quarry provided the stone for nearby Edwardsville viaducts.
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This viaduct, near Treharris, to the southeast of Quakers Yard Station, runs over the River Taff. Constructed as part of Isambard Kingdom Brunel’s single-track Taff Vale Railway it connected Merthyr Tydfil to Cardiff docks. It and opened in 1841. This early railway bridge is 32.3m high, and has six arches of 15.2m span each with octagonal piers. Its westernmost arch passes over the former Merthyr Tramroad (completed 1802), now part of the Taff Trail (NCN cycle route 8). The structure is Graded II* listed ‘as one of the most remarkable bridges by Brunel to survive in Wales’.
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One of IK Brunels many bridges. Still very much in use carrying the Merthyr to Barry valley lines passenger train.
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This is a section of the Taff Trail NCR8 that is unpaved and muddy. Long may this last as the trail has important industrial archeological history. You can still see the stone seats that held the wooden rails of the old tramway in place. For more on the significance, Google Richard "Richard Trevithick (13 April 1771 – 22 April 1833) was a British inventor and mining engineer. The son of a mining captain, and born in the mining heartland of Cornwall, Trevithick was immersed in mining and engineering from an early age. He was an early pioneer of steam-powered road and rail transport, and his most significant contributions were the development of the first high-pressure steam engine and the first working railway steam locomotive.[1] The world's first locomotive-hauled railway journey took place on 21 February 1804, when Trevithick's unnamed steam locomotive hauled a train along the tramway of the Penydarren Ironworks, in Merthyr Tydfil, Wales.[2][3] Turning his interests abroad Trevithick also worked as a mining consultant in Peru and later explored parts of Costa Rica. Throughout his professional career he went through many ups and downs and at one point faced financial ruin, also suffering from the strong rivalry of many mining and steam engineers of the day. During the prime of his career he was a well-known and highly respected figure in mining and engineering, but near the end of his life he fell out of the public eye." - from wikipedia. - https://en.wikipedia.org/wiki/Richard_Trevithick
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Yes, a notable natural feature is the impressive waterfall behind Caegarw. You can experience this on the Giant's Bite and Taff Trail Loop, which follows a beautiful river leading to the waterfall, offering opportunities for wildlife spotting.
Many trails in Mountain Ash East are suitable for dogs, provided they are kept on a leash, especially around livestock or in nature conservation areas. The varied terrain, from riverside paths to forest trails, offers plenty of options for you and your canine companion to explore.
Absolutely. The region offers a range of trails suitable for families. Shorter, less strenuous routes often follow river courses or explore local parks. For example, the Giant's Bite and Taff Trail Loop is an easy 4.3-mile trail that can be completed in under two hours, making it a good option for families.
Yes, Mountain Ash East features several circular routes. These loops allow you to start and finish at the same point, often incorporating diverse scenery. A local favorite is the Taff Trail – Pontygwaith Bridge loop from Quakers Yard, which is a moderate 7.1-mile trail.
The area is rich in both natural and historical landmarks. You can explore the distinctive 'Giant's Bite' quarry on routes like the Twyn Brynbychan Trig Point – Giant's Bite loop from Mountain Ash. Sections of the Taff Trail also feature industrial archaeological history, such as visible stone seats from old tramways. Additionally, the Llwyn-on Reservoir Dam offers scenic views and opportunities for wildlife spotting.
Mountain Ash East is generally well-connected. Many trailheads are accessible by public transport, particularly those along the Taff Trail which links various towns. For drivers, parking is often available near popular starting points, though it's always advisable to check specific route details for designated parking areas.
The terrain in Mountain Ash East is varied, characterized by valley landscapes, river paths, and forested areas. You'll encounter everything from relatively flat, unpaved sections of the Taff Trail to moderate ascents with elevation gains of up to 1,000 feet, as found on the Twyn Brynbychan Trig Point – Giant's Bite loop.
Hiking in Mountain Ash East is enjoyable year-round. Spring brings blooming flora, while autumn offers vibrant fall colors in the forests. Summer provides longer daylight hours, and even winter can be beautiful with crisp air and potential for snow-dusted landscapes, though appropriate gear is essential for colder months.
There are over 180 hiking routes available in Mountain Ash East, catering to a wide range of abilities. This includes 86 easy routes, 93 moderate routes, and 10 more challenging options, ensuring there's a trail for every hiker.
The area is highly rated by the komoot community, with an average score of 4.4 stars from over 200 reviews. Hikers often praise the blend of natural beauty, such as the impressive waterfall behind Caegarw, and the historical interest found along trails like the Taff Trail, which showcases the region's industrial heritage.
Yes, the Taff Trail is a major long-distance route that passes through the area. It offers contrasting scenery, transitioning from the mountains and reservoirs of the Brecon Beacons through valley towns and into Cardiff. Sections near Mountain Ash East, such as the unpaved 'Taff Trail Tramroad Section,' are particularly rich in industrial history.
Certainly. Many trails in Mountain Ash East include ascents to viewpoints that offer expansive vistas of the surrounding valley and beyond. The Twyn Brynbychan Trig Point – Giant's Bite loop, for instance, involves an elevation gain of up to 1,000 feet, providing distinct views from its higher points.
Yes, the region is home to several reservoirs. The Llwyn-on Reservoir Dam, part of the largest of three reservoirs in the Taff Fawr Valleys, offers an immersive experience with conifer forests and deep blue waters, ideal for spotting otters and various bird species.


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