On the longest part of its northern boundary, it is separated from the Barony of Westmorland by the natural boundary of the Shap Fells, which are part of the Lake District's "Far Eastern Fells", being described by Alfred Wainwright as "the high link between the Pennines and Lakeland" [REF].
In its eastern corner, it borders on the ancient Yorkshire parish of Sedbergh, which is nestled in the Pennines, and now part of Cumbria.