The east portion runs 10 miles (16 km) from the city of Fulton's Maple Avenue to the village of Central Square, just short of Interstate 81.
I-81 was built following the NYO&W abandonment and no provision was made to preserve the railroad right-of-way by creating a grade separation.
At that point, the trail to the west (back towards I-81) is ridable, but it ends at a creek where the railroad bridge has been removed.
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