water for the use of the nearby Penrhyn Quarry and then past a caravan site, Ogwen Bank, where the remains of a long abandoned watermill and mill pond still exist. Passing Braichmelyn village on its eastern bank, it is joined by the substantial tributary, the Afon Caseg, which drains a large area of the Carneddau mountains. The course turns slightly more westwards as the river passes through Bethesda and becomes progressively more wooded and more deeply cut providing some white water conditions enjoyed by canoeists. The widening river is then followed by an abandoned railway line (now the Lon Las Ogwen cycle path) through a woodland valley crossing under the main north Wales coast line and the A55 before discharging to the Menai Strait at Aberogwen, near Bangor. Tributaries Right Afon Bodesi Afon Lloer Afon Denau Afon Caseg Afon Llafar Afon Ffrydlas Afon Llan (Llanllechid) Left Nant (neu Afon) Gwern y Gof Nant Bochlwyd Nant Cywion Nant Bual Nant Berfedd References External links www.geograph.co.uk : photos of the River Ogwen Bethesda, Gwynedd Capel Curig Llandygai Llanllechid Menai Strait Ogwen Ogwen Ogwen