4.3
(212)
2,222
hikers
173
hikes
Hiking around Mountain Ash West offers a diverse landscape characterized by rolling hills, wooded valleys, and scenic reservoirs. The region's terrain includes a mix of established paths, former industrial routes, and natural trails, providing varied experiences for outdoor enthusiasts. Hikers can expect elevation changes as routes traverse the valley sides and ascend to viewpoints. The area is well-suited for exploring the natural beauty of the South Wales Valleys.
Last updated: April 23, 2026
5.0
(1)
34
hikers
6.53km
01:48
110m
110m
Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.
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
(1)
11
hikers
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.
6
hikers
10.6km
03:10
330m
330m
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.
5.0
(1)
6
hikers
6.52km
02:09
300m
300m
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.
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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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High above the A470 to the north of Quaker’s Yard, the Giant’s Bite is a dramatic gap in the skyline quarried from the ridge top at the former Cefn Glas mine and quarry. ❤️👌 The site was intensively grazed up to the mid-1990s when a large belt of native trees were planted on the lower slopes. These trees are now maturing and have helped to heal the visible mining scares. The shales forming the upper soil horizons support a wide variety of native flowering grassland species including wild strawberry, cowslip, foxglove and wild thyme, and the site is increasingly becoming re-vegetated by scrub species. Incredibly Fine views of the Taff and Cynon valleys are afforded from the summit ridge, while the line of the former Glamorganshire Canal is also discernible.
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We walked miles. Up to the waterfall on Gillies trail, followed the path up onto the rocky and then to the trig point on Twyn Brynbychan, above the cynnon valleys. Enjoyed a breather on top, before trekking around the back forestry where you can see Aberfan and Merthyr Vale and headed over to the bronze age sight before descending down to Cwmaman and back to the car.
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Such a beautiful and serene reservoir to visit.
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There are over 170 hiking trails around Mountain Ash West, offering a wide range of experiences from easy strolls to more challenging routes. Approximately 83 are considered easy, 83 moderate, and 8 difficult.
Yes, Mountain Ash West has numerous easy trails suitable for beginners. A great option is the Nant Glydach Reservoir and Dam – Waterfall loop from Llanwonno, which is 4.0 miles (6.5 km) long and features a reservoir, dam, and a waterfall.
Hikes in Mountain Ash West vary significantly in length and duration. You can find shorter walks like the Nant Glydach Reservoir and Dam – Waterfall loop from Llanwonno at 4.0 miles (6.5 km) taking under 2 hours, up to longer routes such as the Twyn Brynbychan Trig Point – Smooth Tarmac Cycleway loop from Mountain Ash, which is 10.6 miles (17.0 km) and can take around 4 hours 45 minutes.
Many trails in Mountain Ash West are suitable for families, especially the easier routes that traverse wooded valleys and reservoir paths. The Nant Glydach Reservoir and Dam – Waterfall loop from Llanwonno is a popular choice for its accessible terrain and scenic features like the waterfall.
Most hiking trails in Mountain Ash West are dog-friendly, but it's always recommended to keep dogs on a leash, especially near livestock or in nature reserve areas. The varied terrain, from wooded paths to open hillsides, offers plenty of opportunities for walks with your canine companion.
Yes, Mountain Ash West features several excellent circular routes. For expansive views, consider the moderate Twyn Brynbychan Trig Point – Giant's Bite loop from Mountain Ash, which ascends to a trig point. Another option is the Twyn Brynbychan Trig Point – Smooth Tarmac Cycleway loop from Mountain Ash, offering varied terrain.
Hiking in Mountain Ash West often rewards you with scenic viewpoints, particularly from higher elevations. Routes like the Twyn Brynbychan Trig Point – Giant's Bite loop from Mountain Ash lead to trig points offering panoramic vistas of the South Wales Valleys. You can also find viewpoints overlooking reservoirs and wooded landscapes.
Yes, you can discover waterfalls on some of the trails. The Nant Glydach Reservoir and Dam – Waterfall loop from Llanwonno specifically highlights a waterfall as one of its main attractions. Another trail, the Gillies Trail Waterfall loop from Mountain Ash, also features a waterfall.
Beyond the trails, you can explore several interesting spots. The Taff Trail Tramroad Section offers historical context, while the Giant's Bite and The Giant's Bite Quarry, Daren y Celyn provide unique geological features and views. For cycling enthusiasts, the nearby BikePark Wales also has several highlights like the BikePark Wales Trailhead.
The area is highly rated by the komoot community, with an average score of 4.3 stars from nearly 200 reviews. Hikers often praise the diverse landscape, including rolling hills, wooded valleys, and scenic reservoirs, as well as the variety of trails suitable for different ability levels.
Mountain Ash West is served by local bus routes and has a train station, making some trailheads accessible via public transport. It's advisable to check local bus and train schedules for specific routes and their proximity to your chosen starting point.
Parking is generally available at or near many popular trailheads and local amenities in Mountain Ash West. Some routes may start from village centers or designated car parks. Always check local signage for any parking restrictions or fees.
Mountain Ash West offers enjoyable hiking year-round. Spring brings blooming wildflowers, while autumn showcases vibrant foliage. Summer provides longer daylight hours, and even winter can be beautiful with crisp air and potential for snow, though some paths may be muddy or slippery. Always check weather conditions before heading out.


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