Traeth Llyfn is a secluded bay on Pembrokeshire's rocky north-west coast. Access from the coastal path is down a long set of metal and concrete steps (133 total). The beach is mostly sand and some pebbles and backed by cliffs of slate and shales. It's generally safe for swimming, but a rip current often occurs on the south side. The steps are the only way off the beach, so keep an eye on the incoming tide. Dogs are allowed at all times, but may have to be carried down the metal stairway, which has open-tread steps.
Traeth Llyfn translates as 'smooth beach'.