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    Llanfrynach and Fan-y-Big Walk

    This reflects the 10Adventures difficulty rating for each route. We aim to keep ratings consistent across regions.
    This reflects the estimated time the majority of users will take on this trail. If you are slower, add time to the top-end figure. If you are fast, then you may complete this route faster than this time range.
    This reflects the return distance of this route as measured by the GPS file.
    16.3 km
    This reflects the total elevation gained throughout this route as measured by the GPS file. This includes all ascents and descents, and is higher than what is quoted in most route guides, which simply measure the distance between the starting-point and high-point of the route.
    757 m
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    Directions to Trailhead
    Llanfrynach and Fan-y-Big Walk

    The Llanfrynach and Fan-y-Big Walk is a challenging adventure in Wales that will take you up into the Brecon Beacons for stunning views from the ‘diving board’ rock formation at Fan-y-Big. While tout on the walk, you will pass through the village of Llanfrynach to traverse the open countryside, climbing uphill to the summit of Fan-y-Big before descending along Cefn Cyff. Walkers should take note that this route is best done in favourable weather conditions, as navigation will be easier and the views will be far more scenic.

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    Route Description for Llanfrynach and Fan-y-Big Walk

    Exploring the Brecon Beacons via the Llanfrynach and Fan-y-Big Walk is a challenging undertaking that will lead you through some rugged and tricky to navigate terrain. Be sure to wear proper walking boots, bring plenty of supplies like food and water, as well as a trail map and compass to better navigate the mountains.

    This walking route may be a bit more on the rugged side; however, the stunning views from atop Fan-y-Big will more than make up for the trouble of traversing this long and tough trail. Although casual walkers can certainly attempt this walk, the route is geared more towards experienced adventurers looking to further explore the beauty of Brecon Beacons National Park.

    Setting out from the trailhead, you will make your way to the southeast through the village of Llanfrynach and turn right along Tregaer Road, following it for 0.7 km before turning left. From here, you will continue along the lane to the southeast for 0.5 km and pick up the path on the right.

    Follow along the path as it leads to the southwest through some light tree cover, taking you uphill for the next 4.5 km across the rugged lower slopes of Bryn to eventually arrive at a junction in the trail at the edge of the Gwaun Cerrig Llwydion Plateau. Take a few moments after making the lengthy climb uphill to catch your breath and enjoy the views of the surrounding mountains, before heading right along the trail towards the summit of Fan-y-Big.

    After 0.8 km you will arrive at another junction and take the path on the left, keeping the edge of the hill on your right for the next 2.5 km to eventually arrive at the summit of Fan-y-Big. Here, you can explore the area and make your way out onto the diving board viewpoint for an amazing sightline across the Brecon Beacons, although you should exercise caution if doing so.

    Once you have wrapped up your time at the summit, you will continue on to the northeast and follow the trail as it descends the mountainside while traversing the summit of Cefn Cyff. After reaching the bottom of the slope, you will pass through a series of gates and arrive at the edge of a lane, following it left for 0.4 km, before turning right onto another path. Here, you will pass through another gate and keep straight for the next 2.5 km, traversing the picturesque Welsh countryside on the return to the trailhead in Llanfrynach where you began your adventure along the Llanfrynach and Fan-y-Big Walk.

    Trail Highlights


    Situated within the central part of Brecon Beacons National Park, Fan-y-Big is a subsidiary peak of Waun Rydd and has a height of 717 m. The peak is often climbed alongside the other Brecon Beacons of Corn Du, Pen-y-Fan, and Cribyn, and serves as a great terminus to the route with its diving board-shaped vantage point that offers picturesque views of the surrounding landscape.

    Frequently Asked Questions

    How high is Fan-y-Big?

    Located in the Brecon Beacons range of mountains, Fan-y-Big stands at 717 m and is a subsidiary peak of Waun Rydd.

    What does Fan-y-Big mean in English?

    Fan-y-Big means ‘point of the peak’ in English, which likely stems from its pointed profile as seen from several different directions.

    Insider Hints for Llanfrynach and Fan-y-Big Walk

    • Wear proper walking footwear with good support.
    • Toilet facilities can be found near the trailhead in Llanfrynach.
    • Make sure to bring a map and compass, as it will make navigation along the trail far more manageable.

    Getting to the Llanfrynach and Fan-y-Big Walk Trailhead

    The trailhead for the Llanfrynach and Fan-y-Big Walk can be found next to the Church of St Brynach in Llanfrynach.

    Route Information

    • Backcountry Campground


    • When to do


    • Pets allowed

      Yes - On Leash

    • Family friendly


    • Route Signage


    • Crowd Levels


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    Llanfrynach and Fan-y-Big Walk Elevation Graph

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    Llanfrynach and Fan-y-Big Walk Reviews

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