The entire township is situated within the South Mountain range of southern Pennsylvania.

Between the two ridges is the valley of Mountain Creek, which flows northeast to Mount Holly Springs and is a tributary of Yellow Breeches Creek, which in turn flows to the Susquehanna River.

Pine Grove Furnace State Park is located in the center of the township along Mountain Creek.

Cooke fished for trout there—he was an avid outdoorsman throughout his life—and he annually brought gifts such as pocket knives and scissors to the small school established there for the workers' children.

Cooke Township continues to this day as a very lightly populated but heavily forested area, while the former center of the iron industry within it is now Pine Grove Furnace State Park.

The Pine Grove Furnace was added to the National Register of Historic Places in 1977.