The B5427 is a short road in west Denbighshire. It was originally unclassified but gained its number in 1935.
The road starts on the A470 by the cemetery in the south of Llanrwst and then TOTSOs right immediately to head southeast out of town along Nebo Road. After passing a large school playing field the road narrows and we lose the centre line. The road climbs steadily out of the valley of the River Conwy, soon entering Snowdonia National Park and presently going through a large wood.
After reentering the open fields the road reaches its summit and then descends gently to end at a triangular junction on the B5113.