The highest ground in the North Western Fells is an east-west ridge in this central sector, beginning with Grasmoor above Crummock Water and then gradually descending eastwards over Crag Hill, Sail, Scar Crags and Causey Pike. Outerside is a satellite of Scar Crags, standing out to the north of the main ridge across the marshy depression of High Moss (1,625 ft).