I like taking long walks.
My longest walk was 34 miles (or roughly 80k steps for me) throughout Manhattan and Brooklyn. It included the length of Manhattan tip-to-tip. The northern tip, in Inwood Hill Park, was surprisingly hard to find (my hands even got a little dirty!). I was disappointed to see that there was no plaque commemorating its location.
Another long walk I did went from Hudson Yards to Manhasset. It was around 25 miles. The original goal was the "7 train walk," from Hudson Yards to Flushing. (I've done that walk twice now. It takes you through a lot of neighbourhoods in Queens!) When we got to Flushing, there was still plenty of time left in the day, so we decided to extend the walk to Port Washington, covering the rest of the nearest LIRR line. We ran out of sidewalk (and sunlight) in the affluent village of Plandome, shortly after passing Manhasset. Since there was an LIRR stop in Manhasset, we decided to turn back and call that the end of our walk. My favourite part of this walk was the progression from city to suburb. We saw midtown skyscrapers, then Queens apartment buildings, then multi-family homes, then single-family homes, and finally Long Island mansions.