The western edge of Blorenge is crossed by the B4246 road between Llanfoist and Blaenavon which passes over the climb known as The Tumble (Y Tymbol), which reaches an elevation of close to Keepers Pond (Pen-ffordd-goch Pond) (at ). The climb is regularly featured in cycle races, and has hosted the finish of the final stage of the Junior Tour of Wales since 1989. It is listed as one of the 100 Greatest Cycling Climbs in Britain. The signs at the summit indicate incorrectly that the elevation is .