Moel y Gamelin is a hill in Denbighshire, North Wales, to the northwest of the town of Llangollen. It is the highest summit of a range which stretches eastwards from near the village of Carrog to the Horseshoe Pass (Welsh: Bwlch yr Oernant) traversed by the A542 road, and reaches an elevation of 577 m above sea level. The western part of the range is known as Llantysilio Mountain whilst the eastern end is referred to as Maesyrchen Mountain. At its top is a round cairn, of unknown date, measuring about 30 m in diameter and 1.8 m high. It is in the Clwydian Range and Dee Valley Area of Outstanding Natural Beauty.