Construction commenced on 12 August 1800 and was completed in October 1809. The road starts outside the Yellow House, passes the head of Glencree, with a spur down that valley to Enniskerry, rises to the Sally Gap and then dips down to Laragh, over the hills into Glenmalure, and finishes at Aghavannagh. Well known sections also include the Featherbed Mountain, the section below Kippure Mountain. The total distance was 34 Irish Miles, of which the spur to Enniskerry was 5 Irish Miles.