Bwlch Cerrig Duon & Henrhyd Falls loop from Dan-yr-Ogof — Bannau Brycheiniog (Brecon Beacons) National Park

Embark on a difficult touring bicycle loop through the dramatic landscapes of Bannau Brycheiniog (Brecon Beacons) National Park. This challenging 33.1-mile (53.3 km) route, which takes around 3 hours and 40 minutes to complete, features significant climbs and a total elevation gain of 2844 feet (867 metres). You will cycle through wild Welsh scenery, including the Bwlch Cerrig Duon Pass, offering quiet views of the Western Brecon Beacons and glimpses of Llyn Y Fan Fawr and Llyn Y Fan Fach. While mostly paved, be prepared for some unpaved sections where you might need to push your bike.

This demanding ride requires a very good level of fitness. The route includes notable features like the Devil's Elbow, a steep descent with two sharp switchbacks, and the Bwlch Cerrig Duon Pass, known for its unexpectedly smooth tarmac in places despite the challenging ascent. Plan your gear carefully for the mixed terrain, especially the unpaved sections, to ensure a smooth journey through this rugged region.

A major highlight of the loop is Henrhyd Falls, the highest waterfall in South Wales, plunging 90 feet (27 metres) into a wooded gorge. You can even walk behind the cascading water, though caution is advised due to slippery rocks. This impressive natural landmark also famously served as a filming location for *The Dark Knight Rises*. The surrounding Graig Llech Wood is a Site of Special Scientific Interest, home to diverse wildlife including woodpeckers, warblers, and various mosses.