From the double summit of Heron Pike, a grassy ridge descends south westerly, gradually narrowing until a rougher section falls more steeply at Lord Crag. Beyond here it levels out, curving back a little to the east and passing over a couple of low mounds. The second of these is taken as the summit of Nab Scar. A few hundred yards further on is the scar itself, dropping steeply to the lake with woodland on the lower slopes. On the shore of the lake below the fell is Nab Cottage, past home to various of the Lake Poets. To the west is the little valley of Dunney Beck, separating Nab Scar from a low south western rigg running down from Heron Pike to Town End and the River Rothay. The eastern boundary of Nab Scar is the long, quiet valley of Rydale. All of these waters ultimately meet a Rydal village before turning south for Windermere.