The Adirondack Railway (reporting mark ADIR) was a short-lived tourist railroad which operated in northeastern New York.
It operated trains between 1979 and 1981, including from Utica to Lake Placid, New York, for the 1980 Winter Olympics, before multiple derailments led to the end of service.
The route is now operated by the Adirondack Railroad from Utica to Thendara and Big Moose, New York, which will extend service to Tupper Lake by 2022 after New York State completes track renovation northeast from Big Moose: scheduled for November, 2021.
This route was originally opened by the Mohawk and Malone Railway, a predecessor of the New York Central Railroad, in 1892.
Conrail, successor to Penn Central, still owned the Remsen–Utica portion but permitted the Adirondack to operate trains over it.