Join thousands of cyclists for a one-day tour of every New York City borough with the TD Five Boro Bike Tour. This is said to be the world's biggest charitable bike ride, with a goal of raising money for free bike education programs in New York and more of an emphasis on community rather than competition or speed. Starting in Manhattan's Tribeca, the 40-mile traffic-free course continues to the Bronx, goes back to Manhattan and ventures into Queens and Brooklyn before finishing in Staten Island. Registration opens December 12 at noon—.