At the beginning of the trail, there were these concrete structures shown below.
Turns out they were kilns built in the 1950's by lumberman Pierce Stocking. The sawmill he set up near this spot produced considerable waste that was converted into charcoal in these kilns. The loose, dusty, random-sized material was packed in bags for shipment to stores in much of Michigan for sale to campers and picnickers.
Moving a little further north along M-22, we tried another hiking trail we had never done before either called Pyramid Point Overlook.