We were already in the city, on 5th avenue and 20th.
So we took the 6 train to 59th street and walked east and south to get to 54th street to the East River Esplanade.
This put us on the new pedestrian bridge over the FDR drive.
Then we headed north.
We got all the way to East 84th street, but did have to venture a block inland a few times.
Then we headed to the Q train which we took to Herald Square, and took the PATH train home.