Llanfrynach and Fan-y-Big Walk Route Guide

Route Description for Llanfrynach and Fan-y-Big Walk

Llanfrynach and Fan y Big Walk
Exploring the Brecon Beacons via the Llanfrynach and Fan y Big walk is a challenging undertaking that leads through rugged, often exposed terrain. This Fan y Big walk requires good preparation, including sturdy walking boots, sufficient food and water, and reliable navigation tools such as a map and compass.

While demanding, the Fan y Big walk rewards effort with wide-ranging mountain views and a strong sense of remoteness. The Llanfrynach and Fan y Big walk is best suited to experienced hikers who are comfortable with sustained climbs, changeable weather, and limited waymarking across open hillsides.

Route Overview of the Fan y Big Walk

Starting from Llanfrynach, the route heads southeast through the village before turning onto Tregaer Road for 0.7 km. After a left turn, continue along the lane for 0.5 km to reach a path on the right that marks the start of the main ascent.

The Fan y Big walk climbs steadily southwest through light tree cover before opening onto the lower slopes of Bryn. Over the next 4.5 km, the route gains significant height across rough terrain to reach the edge of the Gwaun Cerrig Llwydion Plateau.

From here, turn right toward Fan y Big, enjoying expanding views across the central Brecon Beacons. After 0.8 km, take the left-hand path and follow the escarpment edge for 2.5 km to reach the summit of Fan y Big.

At the summit, the famous diving board viewpoint is a short detour and offers one of the most striking perspectives in the park. Extreme care is required near the edge, especially in high winds or poor visibility.

Descent and Return to Llanfrynach

Leaving the summit, the Fan y Big walk continues northeast, descending while crossing the broad summit of Cefn Cyff. The route then drops to farmland, passing through several gates before briefly joining a lane for 0.4 km.

A final path leads across rolling countryside for 2.5 km, returning to Llanfrynach and completing the Llanfrynach and Fan y Big walk.

What’s New at Llanfrynach and Fan y Big Walk in 2026

There are no major changes to access, route conditions, or land use affecting the Llanfrynach and Fan y Big walk in 2026. The Fan y Big walk remains exposed and navigation-dependent in poor weather. Walkers should continue to check forecasts and allow extra time for challenging conditions.

Trail Highlights

Fan y Big Summit

Fan y Big stands at 717 m and is a subsidiary peak of Waun Rydd. Known for its distinctive diving board rock formation, Fan y Big is often combined with Corn Du, Pen-y-Fan, and Cribyn. The summit offers dramatic views across the Brecon Beacons and makes this Fan y Big walk a memorable mountain outing.

Frequently Asked Questions

Is the Fan y Big walk suitable for beginners?

No. The Fan y Big walk involves long ascents, exposed sections, and limited waymarking. It is best suited to experienced walkers with solid navigation skills.

How long does the Llanfrynach and Fan y Big walk take?

Most walkers should allow a full day for the Llanfrynach and Fan y Big walk, accounting for rests, weather conditions, and time spent at the summit.

Is the Fan y Big walk dangerous?

The route is not technical but does involve exposure, steep ground, and cliff edges near the summit. Poor visibility and strong winds can significantly increase risk.

Can dogs join the Fan y Big walk?

Dogs can accompany the Fan y Big walk but must be kept under close control, particularly near livestock and exposed edges.

What does Fan y Big mean in English?

Fan y Big translates roughly to “point of the peak,” a name that reflects its sharp profile and prominent escarpment.

If you want to explore the Brecon Beacons over several days, consider a self-guided walking holiday in Wales that includes classic mountain routes and valley walks.