Dinas Dinlle Beach lies on the small settlement with the same name near Bethesda, in Gwynedd, Wales. It is a wide sand and pebble beach with large areas o sand. It offers views to Llyn Peninsula and Ynys Llanddwyn, on Anglesey. The zone around is a designated Site of Special Scientific Interest. Above the beach lies the cliff Boncan Dinas, being occupied by an Iron Age hill fort, which has ben corroded by the beach. The beach can be accessed easily. It is Blue Flag awarded beach. Has two slipways and is popular with watersports passionates, such as scuba divers, windsurfers, jet skiers.