The trail is approximately long and passes through the mountains and uplands of these counties, although it tends to avoid actual summits. The largest mountain on the trail is White Hill, at ; it passes by many larger mountains, including Djouce and Lugnaquilla, although these are usually only accessible by side trails. The northern end of the trail is at Marlay Park in Rathfarnham in south Dublin city. The southern end of the trail is in the village of Clonegal in County Carlow. In its middle section the trail passes through the Glenmalure and Glendalough valleys, both known for their historic background.