Mountain pastures occupy over a quarter of the half million acres in Co Wicklow. The slopes which form the pastures extend from the lowlands of the northeast where the Sugar Loaf rises, to where the southwestern slopes of Lugnaquilla and Keadeen merge into the plains of Carlow and borders of Wexford and west to Hollywood and the Kildare borders.

The Wicklow mountains have been renowned from the earliest times for the native sheep, which are of a distinct type and have been indigenous to these mountains for centuries.