Iron Crag is separated from Caw Fell by an unnamed col at the watershed of Bleaberry Gill and Silvercove Beck. The Western slopes are separated by a much shallower col leading to Whoap. The gentler southern aspect, which is covered by rough grassland, covers a roughly triangular area, bordered on the South by Caw Fell and Bleaberry Gill, and on the West by Lank Rigg and Whoap. The Ennerdale Wall, running over the length of the ridge, marks a striking transition in vegetation, with the Northern slopes of Iron Cragg being mostly carpeted by heather.