Llyn y Fan Fach, Llyn y Fan Fawr, and The Carmarthen Fans Circular
About
This is one of the best hikes in Bannau Brycheiniog National Park (Brecon Beacons), taking you up the Carmarthen Fans (Bannau Sir Gaer), visiting the peaks of Waun Lefrith, Picws Du, Fan Foel, and Fan Brycheiniog. This area boasts breathtaking views, serene lakes, majestic mountains, and abundant wildlife.
The trail starts from the Fforest Fawr car park, where you follow the gravel path along the Afon Sawdde. Gradually ascending, you’ll pass several small lakes before reaching the banks of Llyn-y-Fan Fach, where you’re treated to incredible views across the water with the Carmarthen Fans behind it.
You’ll pass the dam and shelter along the edge of the lake before taking the path up the ridge on the west side of the lake, leading to Waun Lefrith. This ascent is steep initially, but after this first summit, the gradient eases as you continue along the Carmarthenshire ridge path to Picws Du.
Once you reach the top, the panoramic views are incredible, making the climb well worth it. On a clear day, you can see across Bannau Brycheiniog to all the major peaks, including Pen y Fan.
Prepare for a steep descent to the col, where a river crossing awaits, before embarking on another uphill section, turning northwards towards Fan Foel. This particular point along the ridge sticks out, offering brilliant views of the dramatic escarpment that characterises the area.
Follow the ridge southeast towards Fan Brycheiniog, where the (at times steep)descent begins, leading you down to Llyn y Fan Fawr.
Take a moment to savour the tranquillity of the lake, strolling along its banks before continuing on a gentle descent along the base of the ridge. This section of the trail is part of the Beacon’s Way, a long-distance route connecting Abergavenny to Ysgyryd Fawr.
Once you find yourself back at the shores of Llyn y Fan Fach, retrace your steps along the gravel path back to the car park.
While dogs are welcome on this trail, it's important to note that you're likely to encounter free-roaming sheep, so leads are advised.