 Red Pike in Buttermere is given its rich red colouring by the presence of syenite in the rock and subsoil of the fell.This is particularly marked in places where surface erosion has occurred (notably the stony track by the side of Scale Force and the path from Bleaberry Tarn to the summit) and the red colouring of the paths can be seen from some distance.The Western Fells occupy a triangular sector of the Lake District, bordered by the River Cocker to the north east and Wasdale to the south east.