The bike fax best mountain bike trails in north east wales guide 24 routes including the clwydian range the berwyn mountains mynydd hiraethog and coed llandegla in north wales you are never far from a great mountain bike ride and north east wales is no exception the area is a mountain bike paradise the mountains and valleys of north east wales offer a vast array of trails for the mountain biker in the north the clwydian range is already well known for its medley of fast single track wit