The last log train between Kauri and Otiria will have its final run this morning.
Operator KiwiRail said although the train trip would be the last, the line was not closed and would be used again once it became commercially viable.
The only customer north of Kauri, the woodchip company Marusumi, was informed its contract would not be renewed after August because of poor commercial returns and "life-expired wagons".
Currently two trains use the northern part of the line each day and from tomorrow Marusumi's logs will be hauled to its Portland mill by road.
TrackSAFE NZ manager Megan Drayton has reminded the public the only safe place to cross the rail tracks was at a level crossing and that it was illegal to access the rail corridor without a valid permit.