Pen Cerrig Calch & Crug Hywel loop from Cwmdu

This loop is considered a difficult hike requiring very good fitness. You should be prepared for steep, short climbs, uneven pathways, and potentially marshy or boggy sections, especially on higher ground. The final ascent onto the plateau of Pen Cerrig-calch can be particularly demanding.

The route is approximately 20 km (12.4 miles) long and typically takes around 6 hours and 30 minutes to complete. However, allow extra time for enjoying the views, navigating, and taking breaks, especially given its challenging nature.

The terrain is varied, featuring well-worn pathways, fields, and woods. As you ascend, particularly near the summit of Pen Cerrig-calch, the landscape becomes rocky and can be marshy between the rocks. Some sections on high ground may also be boggy. The geology includes Old Red Sandstone, with Carboniferous Limestone outcroppings around the Pen Cerrig-calch summit.

The trail offers spectacular panoramic views. You'll encounter Crug Hywel (Table Mountain), an impressive Iron Age hillfort, and reach the Pen Cerrig-calch summit. From here, you can see the Usk Valley, Crickhowell, the Sugar Loaf, and other peaks of the Black Mountains. On clear days, views extend to Pen-y-Fan. You might also spot Welsh mountain ponies.

Parking is available in Cwmdu, which serves as the starting point for this loop. Specific parking details can often be found on local council or National Park websites, but generally, there are designated areas within or near the village for hikers.

While dogs are generally welcome on trails in Bannau Brycheiniog (Brecon Beacons) National Park, it's crucial to keep them on a lead, especially when crossing farmland, near livestock, or in areas with ground-nesting birds. The varied terrain and potential for livestock mean a lead is highly recommended throughout.

Spring, summer, and early autumn generally offer the most favorable conditions for this hike, with longer daylight hours and milder weather. However, conditions on the exposed summits can be changeable at any time of year. Winter hiking is possible but requires appropriate gear and experience due to potential snow, ice, and strong winds.

No, there are typically no permits or entrance fees required to hike this trail or to access Bannau Brycheiniog (Brecon Beacons) National Park itself. However, parking facilities may have charges.

Yes, sections of this route follow parts of the Beacons Way and the Cambrian Way, offering connections to longer-distance trails within the Bannau Brycheiniog (Brecon Beacons) National Park.

The route can be demanding, particularly the final section onto the plateau of Pen Cerrig-calch. Conditions on the top can be changeable, and a compass (along with navigation skills) is recommended due to potential disorientation in clouds on the domed plateau. Sturdy shoes and sure-footedness are essential for the uneven pathways.

Yes, the route passes by The Farmers Arms, a restaurant that could be a convenient stop before or after your hike in Cwmdu.