The name 'Clun-Gwyn' refers to the white appearance of the water as it crashes over the rock ledge.
The waterfall is situated on the River Mellte, a river known for its tendency to disappear into limestone swallow holes during dry spells.
The drop at Sgwd Clun-Gwyn is approximately 9 meters high.
The Four Waterfalls Walk is part of a designated Site of Special Scientific Interest (SSSI) due to its unique geological formations and rare bryophyte species.
The gritstone cap rock creates a distinctive 'stepped' effect as the river erodes the softer underlying layers.
Sgwd Clun-Gwyn is the first of four major waterfalls encountered on the popular Four Waterfalls Walk in the Brecon Beacons National Park. The waterfall is formed by the River Mellte, which plunges over a gritstone ledge into a deep, wide pool. Its name translates from Welsh as 'Fall of the White Meadow'. The site is part of the Mellte Gorge, an area characterized by its carboniferous limestone and millstone grit geology. The water flow is significantly amplified following heavy rainfall. The site provides access to the broader Four Waterfalls trail, which connects to Sgwd Isaf Clun-Gwyn, Sgwd y Pannwr, and Sgwd Yr Eira. The surrounding woodland consists of sessile oak and hazel, creating a humid microclimate. Visitors typically access the falls via a series of maintained woodland paths from the Cwm Porth car park.
The elevated viewpoint on the main trail before descending toward the riverbed level.
Wear sturdy, waterproof hiking boots with significant tread, as paths become muddy and slippery.
Check local river levels after heavy rain; high water can make the immediate area around the base of the falls inaccessible or unsafe.
Bring a change of clothes if visiting in autumn or winter due to the high likelihood of mud.
Attempting to swim in the pool, as the water is cold and currents near the base can be unpredictable.
Stay on marked paths to prevent soil erosion and protect local flora; keep dogs on leads near steep edges.
