Clogwyn Llech Lefn [Bwlch y Tri Marchog Top] is 637 metres high (2090 ft).
Feature at the peak of Clogwyn Llech Lefn [Bwlch y Tri Marchog Top]: most easterly large rock
Clogwyn Llech Lefn [Bwlch y Tri Marchog Top] appears on the OS Landranger 115 map, at grid reference SH709627