From the top of the Dolgarrog inclines, near Coedty (where it branched from the Eigiau Tramway), the line ran for some 4 miles largely parallel to, and to the north of Afon Ddu. To the north-west lie the slopes of Moel Eilio, and to the south-east is the ridge of Cefn Cyfarwydd. The line ran up to Llyn Cowlyd dam, where it ended in two sidings and a loop.