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United Kingdom
Wales
South Wales
Carmarthenshire

Allt Rhyd Y Groes National Nature Reserve

Routes
Hikes
United Kingdom
Wales
South Wales
Carmarthenshire

Allt Rhyd Y Groes National Nature Reserve

Easy hikes and walks around Allt Rhyd Y Groes National Nature Reserve

4.3

(70)

354

hikers

23

hikes

Easy hiking trails around Allt Rhyd Y Groes National Nature Reserve traverse a diverse landscape of dense sessile oak woodlands, open meadows, and rocky heathland. The terrain is characterized by steep gorges carved by streams and rivers, including the Afon Pysgotwr Fawr. Water features like Pwll Uffern, a cascading waterfall, are notable landmarks. The reserve offers a mix of habitats, providing varied scenery for hikers.

Best easy hiking trails around Allt Rhyd Y Groes National Nature Reserve

  • The most popular…

Last updated: May 3, 2026

5.0

(1)

9

hikers

#1.

Twm Siôn Cati's Cave loop from RSPB Gwenffrwd-Dinas

2.54km

00:44

60m

60m

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

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Easy

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

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

Easy

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

Easy
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Tips from the Community

chris Thomas
April 20, 2025, Cwm Rhaeadr Mountain Bike Trail

Cwm R MTB trail is completely blocked at top end due to hundreds of wind fallen trees this winter. Please consider before as you can not navigate loop.

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On the road from Llanerchindda to Cynghordy in the distance looms this fantastic Viaduct. It was totally unexpected find on my ride. The road takes you under the Viaduct, where there are various plaques. The Cynghordy viaduct, with eighteen arches built in sandstone and lined with brick, is 259 m (850 ft) long on a gentle curve, rising to a height of 31 m (102 ft) above the valley. It is a fine sight.  Still in use today as part of the Central Wales Line.  

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The Cyndhordy Railway Viaduct, an elegant curved structure constructed in 1868, stands as a testament to Victorian engineering prowess and remains operational to this day. As a vital segment of the Heart of Wales line, it plays host to occasional nostalgic steam trains taking tourists on scenic journeys from Shrewsbury to Carmarthen or Swansea and back. This vantage point provides an excellent panorama of the historic arches, complemented by an informative display board to delve into the fascinating history of the bridge.

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Built in 1913 the Rhandirmwyn Bridge links the two sides of the Towy valley by this rivetted girder road bridge. On the southern side you'll find the Towy Bridge Inn, a lovely riverside pub.

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THE TALE OF THE WELSH “ROBIN HOOD” Known as Twm Siôn Cati Twm Siôn Cati is a historically known figure in Welsh folklore. A tale recounted by Meyrick recalls how Twm was asked by a poor man to steal a pitcher for him. They went together to a merchant where Twm started belittling the man's wares. Having told his friend secretly to take the pitcher of his choice, Twm distracted the merchant by telling him there was a hole in one of the pitchers, which the man denied. Twm desired him to put his hand in the pitcher to test it and the man still denied there was a hole. Twm then asked him how, if there was no hole, could he have put his hand inside? By this time his friend had disappeared with his pitcher, undetected. A tale from Prichard's book involves an occasion when Twm is staying in an inn overnight and realises other people are planning to rob him the following day after he sets off. He has a large sum of money with him. The following morning he behaves as though his money is in the pack-saddle of his horse. When the highwayman catches up, Twm drops the saddle in the middle of a pool. The highwayman wades into the pool to fetch it, Twm takes the opportunity to make off with the highwayman's horse. A complication arises because the horse responds to the voice of the highwayman crying "Stop!" Luckily Twm, in terror, happens to shout a word which makes the horse gallop on again, and he is conveyed to safety. Another tale recounts how Twm waylaid a rich squire, who was accompanied by his daughter, Twm was so smitten with her that he returned her jewellery to her and attempted to woo her, against her father's opposition and, initially, her own. One full moon shortly after the robbery, he crept to her window, roused her from sleep, caught her hand at the window and kissed it, refusing to let her go until she promised to marry him. She wouldn't promise so Twm drew his dagger, drew blood on her wrist and threatened to sever her hand unless she assented to marriage forthwith. She agreed to marry him and she kept her hand. Their marriage followed soon after, despite her father's views and the directness of Twm's courtship methods. The girl was supposedly the widow of the sheriff of Carmarthen. Through this marriage Twm is supposed to have gained respectability, eventually becoming a justice of the peace, sitting in judgement on others, a position he held until his death aged 79.

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Cynghordy Railway Viaduct is a very impressive structure if i must say. Located in a remote part of Wales Llandovery which is just north of the Brecon Beacons. Pictures don't convey the unassuming majesty of this incredible sight. To think it was constructed 150 years ago with men and horsepower is awesome. Such a incredible sight to see!! It was like something out of Harry Potter!

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This attractive RSPB site has a circular footpath adjacent to a river with beautiful rock cascades and old mossy trees. It is also home to the Twm Sion Cati's cave. All worth a look off of the bike.

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CLH
August 29, 2022, The Towy Bridge Inn

Fab but the roads over the top are NOT ROADS they are farm tracks. We had to carry our bikes over styles and push them through over animal tracks Would have broken a wheel otherwise However a fab experience none the less TIP: always check the pub is actually open and what time they close

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Frequently Asked Questions

How many easy hiking trails are available in Allt Rhyd Y Groes National Nature Reserve?

There are 7 easy hiking trails in Allt Rhyd Y Groes National Nature Reserve, offering a variety of landscapes from dense woodlands to open meadows. In total, the reserve features over 20 hiking routes across different difficulty levels.

What kind of scenery can I expect on easy hikes in Allt Rhyd Y Groes National Nature Reserve?

Easy hikes here will take you through a diverse landscape of dense sessile oak woodlands, open meadows, and rocky heathland. You'll encounter steep gorges carved by streams and rivers like the Afon Pysgotwr Fawr, and enjoy the soothing sounds of waterways. The area is known for its beautiful scenery, offering breathtaking views of the Carmarthenshire countryside.

Are there any waterfalls on the easy hiking trails?

Yes, a notable highlight is Pwll Uffern, a cascading waterfall that provides a picturesque spot. You can experience a trail that leads through forested areas and along streams, such as the Forest Stream – Rhaeadr Valley Waterfall loop from Pwll Yr Hyddod.

Are there any circular easy walks in the reserve?

Yes, many of the easy trails are circular loops. For example, you can explore the reserve on the Gwenffrwd-Dinas Nature Reserve – Twm Siôn Cati's Cave loop from RSPB Gwenffrwd-Dinas, which is 1.6 miles long, or the slightly longer Twm Siôn Cati's Cave – Gwenffrwd-Dinas Nature Reserve loop from St Paulinus' Chruch.

What natural features or landmarks can I see on an easy hike?

Beyond the diverse woodlands and rivers, you can visit Twm Siôn Cati's Cave, a notable landmark within the reserve. Trails like the Gwenffrwd-Dinas Nature Reserve – Twm Siôn Cati's Cave loop from RSPB Gwenffrwd-Dinas specifically pass by this feature.

What is the best time of year to visit Allt Rhyd Y Groes for easy hikes?

Spring is particularly beautiful, as the reserve is a fantastic place to see bluebells in bloom. The dense woodlands also provide shaded routes, making them ideal for warmer days. The varied flora, including heath spotted orchids in grasslands, offers something to see throughout the growing seasons.

What kind of wildlife might I encounter on the trails?

Allt Rhyd Y Groes is a haven for birdlife. You might spot woodland species like chiffchaffs, redstarts, and wood warblers, or birds of prey such as buzzards and red kites overhead. Along the rivers, look out for kingfishers and dippers. The humid woodlands also support abundant insect life.

What do other hikers enjoy most about the easy trails in Allt Rhyd Y Groes National Nature Reserve?

The area is highly rated by the komoot community, with an average score of 4.3 stars from over 60 reviews. Hikers often praise the diverse habitats, the dramatic gorges, and the winding rivers that define the routes, as well as the stunning scenery that rewards visitors.

Are there any easy trails that offer views of the surrounding area?

Yes, some trails provide excellent views of the surrounding Carmarthenshire countryside. For example, the View of Cynghordy Viaduct – View of Cynghordy Viaduct loop from Cynghordy offers scenic vistas, including the impressive viaduct.

What is the typical duration for an easy hike in the reserve?

Easy hikes vary in length and duration. For instance, the Gwenffrwd-Dinas Nature Reserve – Twm Siôn Cati's Cave loop from RSPB Gwenffrwd-Dinas can be completed in about 45 minutes, while the Forest Stream – Rhaeadr Valley Waterfall loop from Pwll Yr Hyddod typically takes around 1 hour 8 minutes.

Are there any easy trails suitable for families with children?

The reserve offers routes suitable for various abilities, including easy strolls perfect for families. The shorter, less strenuous loops, often with interesting features like Twm Siôn Cati's Cave or waterfalls, are generally good options for children.

Most popular routes around Allt Rhyd Y Groes National Nature Reserve

MTB Trails around Allt Rhyd Y Groes National Nature Reserve

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