To the east of Fellbarrow is the Vale of Lorton, through which flows the River Cocker. This is a wide cultivated valley with a number of small parcels of woodland, the settlement of Thackthwaite lying nearest to the fell.
Fellbarrow is positioned to the east of the Vale of Lorton, where the River Cocker flows through a wide, cultivated valley with scattered woodlands. The nearby village of Thackthwaite is closest to the hill.