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United Kingdom
Wales
South Wales

Onllwyn

The best walks and hikes around Onllwyn

4.4

(2189)

16,621

hikers

177

hikes

Hikes around Onllwyn explore the western edge of Bannau Brycheiniog (Brecon Beacons) National Park. The landscape is defined by river valleys, wooded gorges, and open moorland, with trails often leading to waterfalls. Many routes also follow the paths of former tramways, reflecting the area's industrial heritage.

Best hiking trails around Onllwyn

  • The most popular hiking route is Henrhyd Waterfalls & Graig Llech loop — Bannau Brycheiniog (Brecon Beacons) National Park, a 3.2 mile (5.1 km) trail that takes about…

Last updated: July 5, 2026

4.5

(28)

179

hikers

#1.

Henrhyd Waterfalls & Graig Llech loop — Bannau Brycheiniog (Brecon Beacons) National Park

5.10km

01:25

100m

90m

Moderate hike. Great for any fitness level. Mostly accessible paths. Sure-footedness required.

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Moderate

Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.

Easy
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Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.

Easy

Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.

Moderate

Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.

Moderate
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Popular around Onllwyn

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Tips from the Community

Carl
April 26, 2025, View of Mynydd Du (The Black Mountain)

view of Mynydd Du - the Black Mountain

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Graig Llech Woods occupy the wooded gorge carved by the Nant Llech, as it makes its way to join the River Tawe. The trail through the woods leads to one of South Wales' most spectacular waterfalls, Henrhyd. This 90-foot (27 m) cascade was used as the entrance to the Bat Cave in Christopher Nolan's 2012 blockbuster The Dark Knight Rises.

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Nice little cafe, very welcoming 🙏🏼

4

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Easy trail to explore on a day out

2

1

Easy trail, can be wet & muddy in some places but worth a visit.

3

1

2 BEAUTIFUL HORSES & FRIENDLY

2

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Beautiful view of the mountains

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Frequently Asked Questions

Where is the best place to park for hikes around Onllwyn?

Parking availability varies depending on your chosen trail. For popular waterfall walks, you'll often find dedicated pay-and-display car parks near the trailheads, though these can fill up quickly on weekends. For other routes, starting your hike from one of the local villages like Onllwyn or Coelbren can be a good option, where you may find on-street parking. Always check for local parking restrictions before you set off.

Are there any easy, family-friendly walks in the Onllwyn area?

Yes, the region offers several trails suitable for families. Many of the paths through the woodlands and along the rivers are relatively flat and manageable for younger children. The Henrhyd Falls Bridge – Henrhyd Falls loop from Coelbren is a great option, offering a rewarding waterfall view without being too strenuous. For a different experience, the paths within Craig Gwladys Country Park are well-regarded for being accessible and clearly signposted.

Can I bring my dog on the hiking trails?

Most trails around Onllwyn are dog-friendly, but it's essential to keep your dog under control, especially near livestock on open moorland. The woodland and river paths are particularly popular with dog walkers. Remember that some trails can be steep or have stiles, so choose a route that's suitable for your dog's ability. Always carry water for your dog and be prepared to clean up after them.

What makes hiking in Onllwyn special compared to other parts of the Brecon Beacons?

Onllwyn's unique appeal lies in its blend of dramatic natural beauty and rich industrial history. It's located in the heart of 'Waterfall Country,' offering an incredible concentration of waterfalls accessible via wooded gorges. Many trails also follow the routes of old tramways and railways, like Claypon's Tramway, providing a direct link to the area's coal mining past. This combination of spectacular scenery and historical intrigue sets it apart.

Are there any circular walks that showcase the area's history?

Absolutely. The area is rich with historical routes. A great example is the Henrhyd Falls Bridge – Henrhyd Falls loop from Banwen. This longer walk not only takes you through the beautiful Nant Llech valley but also connects with paths that are part of the wider network of historic trails in the Dulais Valley, reflecting its industrial heritage.

How can I get to Onllwyn using public transport?

Getting to Onllwyn for a hike via public transport is possible but requires some planning. Bus services connect Onllwyn and nearby villages like Coelbren to larger towns such as Neath, which has a mainline train station. From there, you can catch a local bus to get closer to the trailheads. We recommend checking local bus timetables in advance as services in rural areas can be infrequent.

What are some of the best places for hiking near Onllwyn?

The area around Onllwyn is full of fantastic hiking spots. Some of the most popular places include:

  • Elidir Trail: A highly-rated walk through a wooded gorge, known for its series of beautiful, smaller waterfalls leading to the stunning Sgwd Gwladus.
  • Afan Forest Park: A local favourite offering a vast network of trails for both hiking and mountain biking, with stunning views and well-marked paths for all abilities.
  • Sgwd Clun-Gwyn: One of the main attractions on the Four Waterfalls Walk, this powerful waterfall is a must-see and is relatively easy to access from a nearby car park.

What do other hikers enjoy most about the trails around Onllwyn?

The trails here are highly rated by the komoot community. Hikers frequently praise the spectacular waterfalls, especially the unique experience of walking behind the curtain of water at Sgwd yr Eira. Many also appreciate the variety of the landscape, from the shaded, peaceful river valleys to the open, panoramic views from the higher moorlands. The clear marking of many paths is another commonly highlighted positive.

How many hiking trails are there to choose from around Onllwyn?

There is a wide variety of trails to explore, with over 180 routes mapped on komoot around Onllwyn. These range from short, easy walks perfect for a quick outing to challenging full-day hikes into the heart of the Bannau Brycheiniog (Brecon Beacons) National Park, ensuring there's a trail for every fitness and experience level.

Are there any challenging mountain hikes starting near Onllwyn?

Yes, for those seeking a challenge, the area provides access to some of the higher peaks on the western side of the national park. You can tackle ascents to summits like Fan Gyhirych, which stands at 725 meters. These routes reward hikers with a tougher climb and expansive, panoramic views from the plateau summits, offering a different experience from the sheltered waterfall valleys.

What is the best time of year to see the waterfalls?

The waterfalls are impressive year-round, but they are at their most powerful and dramatic after a period of heavy rain. The autumn and winter months often provide the best conditions for seeing the falls in full flow. However, hiking in spring and summer is also beautiful, with lush green woodlands surrounding the cascades, though the water flow might be less intense during dry spells.

Most popular routes around Onllwyn

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Most popular attractions around Onllwyn

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