2019 Map of Portland Mills

About this map

Portland Mills and the western outskirts of Ridgway define the settlement pattern along the southern and eastern edges of this landscape. The terrain is dominated by the dense drainage networks of the Allegheny National Forest, where numerous named waterways like Standing Stone Run, Italian Shanty Run, and Crow Run carve through the plateau toward the Clarion River. The river corridor itself is protected as the Clarion Wild and Scenic River, marking a significant conservation boundary.