Re: Running Tracks in New York City - Outdoor or Indoor
East River Park, at East 6th Street. Pretty beat up, but better than nothing.
Riverbank State Park - West 145th Street and Riverside Drive. Very nice facility.
You used to be able to run on City College's track, but I wouldn't count on it.
Indoors there's the Armory at 168th and Ft. Washington Avenue, but you have to pay a pretty hefty fee for a season pass, although probably cheap compared to a membership at Chelsea Piers.
In the outer boroughs there are a lot more options, including Van Cortlandt Park, Astoria Park, Red Hook Park, Midwood Field.