There are hopes KiwiRail can keep the West Coast moving after Covid-19 restrictions ease.
The TranzAlpine has stopped taking bookings after May 3.
A KiwiRail spokesperson said the winter schedule is likely to change to adapt to demand.
"We will be making decisions very soon and will announce the new schedule as soon as the details are finalised."
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Grey District mayor Tania Gibson said she wants an answer from the Government as to whether or not it can continue through the year
She said their economy depends on it.
"It's not just about the TranzAlpine service, it's about the businesses that service the ports around the line and when it gets into our town."
In 2019 the line had a $40 million upgrade as part of the Government's Provincial Growth Fund.
KiwiRail also operates a train service between Auckland and Wellington and one from Christchurch to Picton as well as the Interislander.
In May last year, the TranzAlpine was shut down for about two weeks due to Covid-19.