Mynydd Llangynider, Mynydd Llangatwg & Craig y Cilau loop from Blaen Onneu

This challenging loop is approximately 22.6 kilometers (about 14 miles) long. Komoot estimates the duration to be around 6 hours and 17 minutes, but actual time can vary based on fitness levels, weather conditions, and how much time you spend exploring the various points of interest.

This loop is considered a difficult hike. It features steep ascents, scree-covered slopes, and potentially very boggy sections, especially across the moorland plateau. Good fitness, sturdy footwear, and sure-footedness are essential.

The terrain is varied and challenging. You'll encounter undulating moorland, well-worn paths, steep ascents, narrow paths near rock faces, and scree-covered slopes. Be prepared for potentially very boggy sections, particularly on the open plateau. The landscape also features karstic elements like cliffs, caves, and numerous shakeholes.

The loop starts from Blaen Onneu. While specific parking details aren't provided, Blaen Onneu serves as the primary access point for this trail.

While dogs are generally welcome in Bannau Brycheiniog (Brecon Beacons) National Park, this particular trail presents challenges. The varied terrain includes steep sections, scree, and potentially boggy ground, which might be difficult for some dogs. Always keep dogs under close control, especially near livestock, and be mindful of wildlife and ground-nesting birds.

Spring, summer, and early autumn generally offer the most favorable conditions. During these seasons, you're more likely to experience clearer views and less challenging boggy sections. Winter can be very exposed and difficult due to weather conditions and potentially deeper bogs.

No, you do not need a permit or have to pay an entrance fee to hike this trail within Bannau Brycheiniog (Brecon Beacons) National Park. Access to the park's trails is generally free and open to the public.

This loop offers numerous points of interest. You'll pass the Mynydd Llangynidr Trig Point (541 m) and Mynydd Llangynidr Cairn Summit for superb views. Other highlights include the historical Chartist Cave, the Mynydd Pen-Cyrn Summit, and the impressive Craig y Cilau: Crags and Caves, which is a National Nature Reserve. You might also spot 'The Lonely Shepherd' limestone pinnacle on Mynydd Llangatwg.

Yes, the route briefly intersects with sections of the Cambrian Way, which covers about 38% of the trail. It also crosses smaller official trails like Crescent Cave, Ogof Gwaliau Gwynion, and various sections related to the Chartist Cave and Eglwys Faen cave systems.

Given the trail's difficulty and varied terrain, it's crucial to be well-prepared. We recommend sturdy waterproof hiking boots, appropriate layers of clothing for changing weather, waterproof outer layers, plenty of water and snacks, a map and compass (or a reliable GPS device), and a first-aid kit. Trekking poles can also be very helpful for stability on steep or boggy sections.

Absolutely! This area is a prime example of a karstic landscape. Keep an eye out for numerous caves and shakeholes, especially around Craig y Cilau. The impressive limestone cliffs of Craig y Cilau are a significant geological feature, and below Mynydd Llangatwg lies an extensive cave system, including some of Britain's longest caves.