Lord of the Fells is a customary title of the Lords of Bowland. The title is thought to have become customary during the high medieval period as a description of the Lords' rugged upland demesne. Bowland Fells, more widely known as the Forest of Bowland, is an area of barren gritstone fells, deep valleys and peat moorland, mostly in north-east Lancashire, England. A small part lies in North Yorkshire, and much of the area was historically part of the West Riding of Yorkshire.