Bwlch y Ddwyallt [Gwaun Cerrig Llwydion] is 754 metres high (2474 ft).
Feature at the peak of Bwlch y Ddwyallt [Gwaun Cerrig Llwydion]: no feature
Bwlch y Ddwyallt [Gwaun Cerrig Llwydion] appears on the OS Landranger 160 map, at grid reference SO054203