65
runners
6
runs
Jogging routes around Nant Irfon National Nature Reserve traverse a landscape characterized by ancient oak woodlands, vast moorlands, and the prominent River Irfon. This protected area in Powys, Wales, offers diverse terrain for runners, from riverside paths to higher tracks with views of the surrounding hills. The region features steep-sided valleys and a mix of forested areas and open moorland, providing varied scenery and challenges for running.
Last updated: August 28, 2026
6
runners
7.59km
00:54
180m
180m
Moderate run. Good fitness required. Mostly accessible paths. Some sure footedness required.
7
runners
8.56km
01:00
190m
190m
Moderate run. Good fitness required. Mostly accessible paths. Some sure footedness required.

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6
runners
12.5km
01:36
380m
380m
Hard run. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
7
runners
14.8km
01:33
160m
160m
Moderate run. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
5
runners
11.7km
01:20
270m
270m
Moderate run. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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Popular around Nant Irfon National Nature Reserve
A short climb up from the road brings you to the Dam and carpark, there is no access over the Dam itself. But you do get a good view over the spillway and valley below.
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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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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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Llyn Brianne is a spectacular reservoir at almost 300m (990ft) above sea level. It is Wales second largest reservoir by volume and is contained by a 91m (300ft) stone-built dam, which is the largest of its kind in Europe.
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This is a 4km circular walk, no facilities at this location just a small car park that has a Donation Box to park at. Twm Sion Cati is from folklore, and it said that he hid in this cave. Twm Sion Cati earned a reputation as a sort of Welsh Robin Hood!! Roaming the rugged west and mid part of Wales, robbing from the rich, but somehow forgetting the bit about giving to the poor. It is thought that Twm had some formal education from the tales told, he appears to have developed from a common thief and highway man into quite a crafty and clever conman. Thomas Jones, otherwise known as Twm Sion Cati was born around 1530 at Tregaron. His mother was Catherine known as Cati Jones. Although some stories claim that he was the illegitimate son of the local squire, it is more likely that his father was actually John (Welsh form Sion) son of David ap Madog ap Howel Motheu.
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Twm Siôn Cati's Cave Is Situated within the RSPB Gwenffrwd-dinas Nature Reserve, the cave is reachable by a walk through woodlands, alongside a river bank and a steep climb to the top of Dinas Hill.
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The road that snakes its way around Llyn Brianne Reservoir is spectacular and dizzying in equal measure
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There are several running routes available in and around Nant Irfon National Nature Reserve. Our guide features 6 highly-rated routes, offering diverse options for your outdoor adventure.
Jogging routes in Nant Irfon offer a varied terrain. You'll find paths winding through ancient oak woodlands and conifer plantations, alongside the prominent River Irfon, and across vast moorlands. Some areas feature steep-sided valleys and higher tracks with views, providing a mix of surfaces and challenges.
Yes, many of the running paths in the area are designed as loops, allowing you to start and finish in the same location. For example, the Running loop from Llanwrtyd Wells is a popular moderate option, and the Caffi Sosban loop from Llanwrtyd Wells also provides a scenic circular experience.
Yes, for more experienced runners seeking a challenge, the broader area around Nant Irfon offers demanding ascents. While our guide includes one difficult route, the region is known for challenging terrain like the Drygarn Fawr Trig Point loop and the exceptionally steep Devil's Staircase, which can test very fit trail runners. The Llyn Brianne Dam – Llyn Brianne Dam Crossing loop from Cefn Isaf offers significant elevation gain for a moderate route.
While running in Nant Irfon, you can experience diverse natural beauty. The reserve is characterized by ancient oak woodlands, the prominent River Irfon with dramatic sections like Wolf's Leap (Camddwr Bleiddiad), and expansive moorlands. You might also encounter historical features like the stone ruins of Digyff, an ancient farmhouse, adding a touch of history to your run. Don't miss the stunning View Over Abergwesyn Common.
While the guide doesn't specifically list 'easy' routes, many of the moderate trails starting from Llanwrtyd Wells, such as the Running loop from Llanwrtyd Wells, offer accessible paths and varied scenery that can be enjoyed by families looking for a less strenuous run. The diverse trails cater to different fitness levels, with some paths being more easily accessible.
Nant Irfon National Nature Reserve is generally dog-friendly, but it's crucial to keep dogs under close control, preferably on a lead, especially in areas with livestock or ground-nesting birds. The varied trails, from woodlands to moorlands, offer great opportunities for you and your canine companion to enjoy a run together.
The reserve offers unique beauty throughout the year. Late spring is particularly scenic when swathes of bluebells transform the woodland floor. Spring and summer also bring abundant birdlife. However, the terrain can be rough and boggy in wetter conditions, so sturdy footwear is essential, especially outside of drier months.
Yes, there are parking options available, particularly near popular starting points like Llanwrtyd Wells. Many of the featured running loops, such as the various routes from Llanwrtyd Wells, are easily accessible by car with nearby parking facilities.
Runners frequently praise the tranquility and diverse natural beauty of Nant Irfon. The mix of ancient woodlands, the prominent River Irfon, and expansive moorlands provides a peaceful and immersive outdoor experience. Over 50 runners have used komoot to explore the varied terrain, highlighting the area's dramatic and evocative appearance.
Yes, the nearby town of Llanwrtyd Wells, which serves as a starting point for several running loops like the Caffi Sosban loop, offers options for refreshments. You can find cafes and pubs in the town to refuel after your run.
The running routes in Nant Irfon vary in distance and duration. For example, the Running loop from Llanwrtyd Wells is about 4.7 miles (7.5 km) and takes approximately 50 minutes. Longer routes, such as the Running loop from Llanwrtyd, cover around 9.2 miles (14.8 km) and can take about 1 hour 30 minutes to complete.


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