5.0
(5)
34
hikers
3
hikes
Mountaineering routes around Llangynidr are situated within the Brecon Beacons National Park, offering access to a diverse landscape of mountains, moorlands, and valleys. The area is characterized by prominent peaks such as Pen y Fan, Corn Du, and Fan y Bîg, which rise above the Usk Valley. Mynydd Llangynidr, an undulating plateau reaching 557 meters, features Palaeozoic Era sandstones and limestones, with numerous shakeholes on its surface. This region provides varied terrain for mountaineering, from challenging ascents to more moderate…
Last updated: July 5, 2026
5.0
(5)
30
hikers
14.0km
04:36
610m
610m
Moderate mountaineering route. Good fitness required. Easily-accessible paths. Suitable for all skill levels.
2
hikers
9.20km
03:09
460m
460m
Moderate mountaineering route. Good fitness required. Easily-accessible paths. Suitable for all skill levels.

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2
hikers
15.3km
04:33
420m
420m
Moderate mountaineering route. Good fitness required. Easily-accessible paths. Suitable for all skill levels.
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Wonderful view of the surrounding hills. The views reward the effort it takes to climb this mountain.
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Torpantau Tunnel is a closed-down, 666-yard-long abandoned masonry railway tunnel in Wales that was opened in 1863 and closed down in 1963. It was part of the Brecon and Merthyr Railway line and, at 1,313 feet above sea level, was the highest tunnel on the UK railway network. Now it is disused but is often used as part of team building and adventure walks by local activity providers. If you are thinking of using it, you will need wellingtons (which will just about keep you dry) and a head torch. It is a brilliant place to lead a group of kids through and jump out to scare them half to death.
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Nice little rock that sits out beyond the edge that can create a nice photo effect
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Craig Gwaun Taf is the sheer escarpment that runs south from Corn Du, and overlooks the valley of Blaen Taf Fechan.
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Cribyn is the smallest of the Brecon's 'big Three, but it is a shapely top and should be included in any climb up here.
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When coming off the mountain to go down towards the car park it’s quite a steep scramble and can be slippery
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The Stunning Blaen-y-Glyn Uchaf- located in Talybont has many different routes, with plenty to discover views are breathtaking. Another beaut and tip to visit is.. The Blaen-y-Glyn Uchaf waterfall circular and the Wellington Bomber Memorial Trail is fantastic walking route in Wales that will take you through the mountainous terrain of Brecon Beacons National Park to visit the crash site of a World War II Canadian bomber plane. While out walking you discover paths looping around Bwlch y Ddwyallt and Waun-Rydd to arrive at bomber site.
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Great viewto the steep side of Pen y Fan and worth getting up here on its own right.
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The mountaineering routes around Llangynidr offer a diverse landscape within the Brecon Beacons National Park. You'll encounter prominent peaks, expansive moorlands, and the picturesque Usk Valley. Mynydd Llangynidr, for instance, features Palaeozoic Era sandstones and limestones with numerous shakeholes, indicating a significant karst landscape. Expect varied surfaces, from well-established paths to more rugged mountain terrain.
While the routes listed are generally moderate, the area around Llangynidr caters to a range of outdoor enthusiasts. For families, consider exploring parts of the Monmouthshire and Brecon Canal for tranquil walks, or shorter sections of the mountain trails. Always assess the difficulty and duration of a route, such as the Craig y Fan Ddu loop from Allt Forgan, to ensure it's suitable for all members of your group.
Many trails in the Brecon Beacons National Park are dog-friendly, but it's crucial to keep dogs under control, especially around livestock. Always check local signage for specific restrictions, particularly during lambing season. Ensure your dog is fit enough for the chosen route and carry water for them.
The region is rich in natural beauty and geological interest. You can encounter features like the ancient cairn at the summit of Mynydd Llangynidr, or the dramatic views from peaks such as Pen y Fan, Corn Du summit, and Fan y Bîg Summit and Diving Board. The area also features a limestone karst landscape with shakeholes and notable caves like Ogof Fawr (Chartist Cave).
Yes, there are several circular routes that allow you to experience the diverse landscapes. For example, the Corn Du summit – Pen y Fan loop from Neuadd Car Park is a popular circular option, as is the Craig Cwareli – Fan y Big loop from wild camp.
The mountaineering routes around Llangynidr are generally rated as moderate. They involve significant elevation gains, such as the 612 meters of ascent on the Corn Du summit – Pen y Fan loop, and cover distances up to 15 km. These routes require a good level of fitness and appropriate gear.
Spring and autumn often offer the most pleasant conditions for mountaineering in the Brecon Beacons, with cooler temperatures and potentially clearer views. Summer can be warm, while winter brings the possibility of snow and ice, requiring more advanced skills and equipment. Always check weather forecasts before heading out, as mountain conditions can change rapidly.
Specific parking information varies by trailhead. For routes like the Corn Du summit – Pen y Fan loop, parking is available at Neuadd Car Park. For other routes, such as the Craig y Fan Ddu loop, you might start from areas like Allt Forgan. Always plan your parking in advance and arrive early, especially on busy days.
The duration of mountaineering routes varies depending on their length and elevation gain, as well as your pace. For instance, the Corn Du summit – Pen y Fan loop, which is 14 km long, typically takes around 4 hours 35 minutes. Shorter routes like the Craig y Fan Ddu loop (9 km) can be completed in about 3 hours 6 minutes.
The mountaineering routes in Llangynidr are highly rated by the komoot community, with an average score of 5.0 stars. Mountaineers often praise the extensive views across the Brecon Beacons, the dramatic landscapes, and the opportunity to ascend iconic peaks like Pen y Fan and Corn Du.
While popular peaks like Pen y Fan can attract many visitors, exploring routes on Mynydd Llangynidr or other less-frequented paths can offer a more tranquil experience. The area is mapped as open country, allowing walkers to roam freely in many places, which can help find quieter spots away from the main trails. Consider visiting during off-peak seasons or weekdays for fewer crowds.
Given the varied mountain weather, it's essential to dress in layers. Waterproof and windproof outer layers are crucial, along with moisture-wicking base layers. Sturdy hiking boots with good ankle support are recommended. Always carry extra warm clothing, even in summer, and be prepared for sudden changes in conditions.


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