The Hudson River

The river is 325 miles long, stretching from it's source on the slopes of Mt. Marcy in the Adirondack Mountains to the Verrazano Narrows, which separates New York City's upper and lower bays.
Ocean tides extend upriver as far as the falls and the Federal Lock at Troy (158 miles).
Maximum tidal currents of 2 to 2 1/2 knots are typical.

A high tide "passing" New York City normally takes 9 to 10 hours to reach Troy.  Typically tidal ranges are 4 - 6 feet.