The A5108 is a short road serving the village of Moelfre on Anglesey's east coast. The road was originally unclassified then became part of the B5110 in 1935. Class I status dates to the 1950s, although some maps claim the road is unclassified again.
The road starts at a roundabout on the A5025 at Llanallgo and heads northeast, with the sea visible from the outset. There is a brief rural stretch, although a few buildings are passed, before the road enters Moelfre. It descends gently and soon reaches a turn-off for a car park. Theoretically the road should end here as the road ahead narrows and there should be no through traffic - but in fact the A5108 continues ahead. It zigzags through the narrow village streets, round a few blind corners and past another car park before running along the beach. The road then climbs to reach another sharp left-hand bend, at the junction with a road called Lôn Swnt and ends here without ceremony.
