Ran 17 mi. out & back , Tarrytown (Tower 11 or 14, depending on map) to Ossining (Snowden Ave.). Varied terrain - dirt, mud, rock, asphalt, concrete. Passes thru woods, towns, parks, even residential backyards! Maybe five minutes of Hudson River sightings. Even w/an additional local map (recommended, www.aqueduct.org), I got good and lost a few times.