Clipyn Du

Clipyn Du is a mountain in northern Powys in Wales. Also known as Tarren Bwlch-Gwyn or Siambwr Trawsfynydd, it is one of the higher summits of the area and is located a few miles north of Plynlimon (Pumlumon). It has an elevation of 582 m and a topographic prominence of 124 m, so is classed as a HuMP, having over 100 metres of prominence. Tarren Bwlch-Gwyn is the name of a steep-sided escarpment nearby. Nearby is a lake, Glaslyn.