., Mold, Flintshire, Wales

Map of River Alyn location

The River Alyn is a tributary of the River Dee. The river Alyn rises at the southern end of the Clwydian hills in the Llandegla Moors and the Alyn Valley forms part of the Clwydian Range Area of Outstanding Natural Beauty. The main town on the river Alyn is Mold, the county town of Flintshire. The River Alyn crosses the carboniferous limestone from Halkyn Mountain and North through the Loggerheads area before heading southeast making through Mold before making its confluence the The Dee at to the northeast of Wrexham. Between Loggerheads and Rhydymwyn it runs through the Alyn Gorge, which is the site of the caves Ogof Hesp Alyn, Ogof Hen Ffynhonau and Ogof Nadolig. For parts of this stretch the river bed is dry for most of the year. The Alyn originally emptied into the Irish Sea, but at the end of the last glaciation, its course was diverted by sea ice that blocked its way to the sea. The river was forced to cut its way through the limestone ridge to the North East of Colomendy and now it flows on the edge of Mold.....