Glen Auldyn  Glen Auldyn is a narrow valley about long on the Isle of Man, with a river of the same name. This flows in a NNE direction and flows into the River Sulby not far from its estuary, near Ramsey. It is entirely within the parish of Lezayre. The lower one-third of the valley is inhabited and is partly followed by the B16 road. This section is overlooked by Sky Hill. The middle section of the valley contains a ribbon of mature oak woodland. The valley contains the church of St Fingan. In the valley is an underground reservoir with a capacity of around which supplies the north and east of the island.