The Clwydian Range (Welsh: Bryniau Clwyd) is a series of hills and mountains in north east Wales that runs from Llandegla in the south to Prestatyn in the north, with the highest point being the popular Moel Famau. The range is designated as an Area of Outstanding Natural Beauty. The AONB has been extended to include the Dee Valley around Llangollen including the Horseshoe Pass and Castell Dinas Bran, extending the area to 150 square miles (389 square km). The highest point in the AONB is Moel y Gamelin at 1,893 feet (577 metres).
The Clwydian Hills are formed from an upstanding block of Silurian age sandstones, mudstones and siltstones. The range's rocks are intensely faulted; the major Vale of Clwyd Fault is responsible for the impressive west-facing scarp of the Clwydian Range. It downthrows the rocks to the west and separates the younger Carboniferous and Permo-Triassic rocks of the Vale of Clwyd from those of the hills.
The summits of the hills in the Clwydian Range provide extensive views across northern Wales, to the high peaks of Snowdonia, eastwards across the Cheshire Plain and the Peak District, and towards Manchester and Liverpool to the northeast. They have heather-clad summits above rolling pastures. The Offa’s Dyke National Trail traverses the range from Chirk to Prestatyn and at the southeastern end of the range is Llandegla Forest, a wooded area with mountain bike trails.