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South Wales
Rhondda Cynon Taf

St Gwynno Forest

The best dog-friendly hikes and walks around St Gwynno Forest

4.4

(393)

3,468

hikers

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hikes

Dog friendly hiking trails around St Gwynno Forest traverse a landscape characterized by mixed woodlands, serene reservoirs, and low hills. The area features diverse tree cover, from deciduous to evergreen, providing varied scenery throughout the year. Hikers can explore routes that pass by significant water features such as Lluest-wen Reservoir and various waterfalls, including Pistyll Goleu. The terrain includes accessible paths and elevated spots that offer views of the surrounding valleys and, on clear days, glimpses of the Brecon Beacons.

Last updated: July 6, 2026

5.0

(1)

5

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#1.

Gillies Trail Waterfall loop from Mountain Ash

6.52km

02:09

300m

300m

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

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Moderate

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

Moderate
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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

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

Moderate

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Tips from the Community

Chris Shannon
June 12, 2026, Gunpowder Works Falls

A piece of Welsh history very impressive falls well worth a visit to explore

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Nice waterfall I didn't go down but I believe you can get close by going down but it looks slippery and steap

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Zoe Evans
February 27, 2024, Pwll Berw Waterfall

The Gunpowder Works at Pontneddfechan is a historic site located in the village of Pontneddfechan, in the Brecon Beacons National Park, Wales.

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David Howells
February 19, 2024, Sgwd Yr Eira

Sgwd yr Eira is the most impressive waterfall in the Pontneddfechan area. It is a high, broad, and powerful waterfall that resembles a curtain of water when it is in full flow. The fact that you can walk behind it just adds to the beauty of this amphitheatre you find yourself in. To get there, however, you have to take around 170 steps that go down the steep side of the valley to the river bed. If this worries you somewhat, just take your time when you go down and when you come back up. In addition, at the bottom, the path that goes to the waterfall is rocky and slippery, and if you walk behind the waterfall, it will be a bit wet, so a waterproof might be necessary.

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David Howells
February 11, 2024, Sgwd Yr Eira

The Four Waterfalls Walk is my idea of heaven. Hidden away in a quiet corner of the Brecon Beacons, there is a famous waterfall trail that takes in four great waterfalls, it is located near the quaint village of Ystradfellte. The trail has stunning scenery, and the main access to it is from the car park at Porth yr Ogof, or the Cwm Porth car park, to give it its proper name. The Four Waterfalls are all spectacular in their own different ways, and they are Sgwd Clun-Gwyn, Sgwd Isaf Clun-Gwyn, Sgwd y Pannwr, and Sgwd yr Eira.

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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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This is a stunning waterfall. In the right spate conditions it’s even possible to kayak off the top…if your good and daft enough!😵‍💫

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Moderate trail with high elevation and amazing wild swimming pools & beautiful views along the way . Enjoy 😀

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Frequently Asked Questions

How many dog-friendly hiking trails are available in St Gwynno Forest?

There are 5 dedicated dog-friendly hiking trails in St Gwynno Forest featured in this guide. These routes range from moderate to difficult, offering a variety of experiences for you and your canine companion.

What kind of terrain can I expect on dog-friendly trails in St Gwynno Forest?

The trails in St Gwynno Forest typically feature mixed woodlands with both deciduous and evergreen trees, providing varied and scenic environments. You'll encounter woodland paths, some routes around reservoirs, and low hills. The terrain is generally well-maintained, but can include natural surfaces, so appropriate footwear for both you and your dog is recommended.

Are there any dog-friendly trails that feature waterfalls?

Yes, St Gwynno Forest is home to beautiful water features. The Gillies Trail Waterfall loop from Mountain Ash is a great option that allows you to explore the area's natural beauty, including a waterfall. You can also find the general highlight for Waterfall within the forest.

Are there any circular dog walks available in St Gwynno Forest?

Many of the dog-friendly routes in St Gwynno Forest are designed as circular walks, allowing you to start and end at the same point. Examples include the Gillies Trail Waterfall loop from Mountain Ash, the Forest Path – Gillies Trail Waterfall loop from Mountain Ash, and the Twyn Brynbychan Trig Point – Giant's Bite loop from Mountain Ash.

What are some challenging dog-friendly hikes for more active dogs and owners?

For a more challenging experience, consider the Gwaelod Y Garth Inn – Garth Summit loop from Pontypridd. This route is rated as difficult and features significant elevation gain, perfect for well-conditioned dogs and hikers looking for a longer, more strenuous adventure.

Can I find trails with good viewpoints for my dog and me?

Absolutely! St Gwynno Forest offers several spots with rewarding views. From certain elevated points, you can enjoy panoramic vistas, potentially including the Brecon Beacons and even glimpses of the Bristol Channel on clear days. The View of the Brecon Beacons from St Gwynno Forest is a notable highlight. While not a specific route, the Twyn Brynbychan Trig Point – Giant's Bite loop from Mountain Ash will take you to higher ground where views are possible.

Are there any historical sites or landmarks I can visit with my dog?

The area around St Gwynno Forest is rich in history. While specific routes may not directly pass through all historical sites, the forest itself is home to the ancient St Gwynno Church. You can also find highlights like the Bryn Du Climb from Aberdare and Blaenllechau Climb which are part of the region's character.

What do other hikers say about the dog-friendly trails in St Gwynno Forest?

The komoot community highly rates the trails in St Gwynno Forest, with an average score of 4.37 out of 5 stars from 339 ratings. Hikers often praise the varied woodlands, the peaceful atmosphere, and the well-maintained paths, making it a popular choice for walks with dogs.

Is there parking available for dog walkers in St Gwynno Forest?

Yes, there are various parking options available around St Gwynno Forest, particularly near popular trailheads and access points. It's always a good idea to check the starting point of your chosen route for specific parking information, as some routes may begin from villages like Mountain Ash or Pontypridd which have public parking facilities.

Are there any dog-friendly facilities or pubs nearby the trails?

While specific dog-friendly facilities directly on the trails might be limited, the villages surrounding St Gwynno Forest, such as Mountain Ash, Pontypridd, and Hirwaun, often have pubs and cafes that welcome well-behaved dogs, especially in their outdoor seating areas. It's advisable to check with individual establishments beforehand.

What's the best time of year to hike with my dog in St Gwynno Forest?

St Gwynno Forest offers a beautiful experience year-round. Spring brings lush greenery and wildflowers, while autumn showcases stunning foliage. Summer is great for longer days, but remember to bring plenty of water for your dog. Winter can be beautiful with crisp air, but trails might be muddy or icy, so check conditions before heading out. Each season offers its own charm for dog walks.

Are there any trails where my dog can swim?

St Gwynno Forest features several reservoirs, including Lluest-wen Reservoir and the historically significant Clydach Reservoir. While some trails offer views around these bodies of water, direct access for dog swimming might be restricted in certain areas for water quality or safety reasons. Always look for signage and ensure your dog's safety if allowing them near water.

How long do the dog-friendly hikes typically take?

The duration of dog-friendly hikes in St Gwynno Forest varies depending on the route and your pace. For example, the Gillies Trail Waterfall loop from Mountain Ash takes approximately 2 hours, while the longer Lamb Hotel – Penderyn Trailhead loop from Hirwaun can take around 3.5 hours. Always consider your dog's fitness level and plan accordingly.

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