Start at east end of Glynneath on unclassified road (old A465) at recessed drain cover south of junction with Ynys-y-Nos Ave at Pont Walby. Proceed uphill to FINISH at lay-by near summit by field gate 100 yards short of Cefn Rhigos sign. 1.6 miles OS references: start SN 891060, finish SN 912072