The R591 travels southwest from the N71 near Bantry to the village of Durrus. Durrus is also a gateway to the Sheep's Head Peninsula, the Mizen Peninsula's northern neighbour across Dunmanus Bay. The R591 continues via Toormore and Goleen. The road ends at Crookhaven, a yachting harbour village. Before Crookhaven, a scenic, rugged minor road leads to Mizen Head. The R591 is long.