Who maintains trails? Volunteers?
Eeek, that's gonna be a lot of work - though I'm impressed with how much is done already!
That heavy cutting was probably done by DNR with the prison work crews. There's a state min security prison inside the forest. They do all the heavy duty stuff with installing drainage and bridges, and cutting trees. Winter is their prime time for that kind of maintenance, and I guess they probably have to get the trail clear before they can even survey it to see what needs done.