This clandestine bicycle track in the woods overlooking Montclair seems to be abandoned; there are fallen trees lying across it. I’m assuming that it was used by pedal-pumping kids, because dirt bikes would have been heard for miles around.
It represents a huge amount of work. But that’s our specialty: digging up the ground for purposes far beyond our biological needs. Researchers calculate that human activity, from dam-building to mining and beyond, now surpasses every other single geologic agent in moving stuff around.