I think that the remaining lines that have been mentioned are basically hauling from a "re-load" to the mill. Nowadays trucks are used to call cut logs to a location where the logs are reloaded onto railroad cars for the haul to the mill.
The days of cutting a tree and then immediately loading it onto a car setting on temporary track for the trip to the mill are long gone.
The other year after the major fires in Arizona timber areas the burned trees were logged out and where shipped to mills in California for cutting into useable lumber. There was a write up in "Railfan and Railroad" about this operation.
Brian Norden