If you plan to stop anywhere along the way to visit museums, etc. you risk having your bike stolen, too. You really would be better off using the subway and walking.

I'm sorry, I never answered your question. You'd be better off answering this question in a bicycle forum. In the United States, in most places, bicycles are legally allowed to ride wherever cars are allowed. The only obvious exception is the Interstate highway system. However, it may not be pleasant or safe. This website http://offmetro.com/ny/2010/05/17/bike-bridges-nyc/ says that the Queensboro bridge is possible but "not recommended" because "This car-free bike path runs alongside the bridge’s superstructure so traffic noise is constant and the views are limited. Once you get to Queens, there are no parks or dedicated bike paths to whisk you around." There's a YouTube video made by someone who rides across the Queensboro bridge daily: https://www.youtube.com/watch?v=b9laUiweAo4

Hello baby blue, Yes. You can take the Queensboro bridge and make the trip. They converted one lane of the bridge to pedestrian and bicycle traffic only. It is about 14.5 miles or 23.33 kilometers. The crowds and traffic in Manhattan might be a bit tricky to navigate but I think you should be fine. Good luck and be safe.

New York City has five "boroughs:" Manhattan Island, the Bronx, Brooklyn, Queens, and Staten Island. When we think of New York, we usually think of Manhattan. Manhattan is an island. It's surrounded by water: the Hudson River on the west, and the East River on the east. I imagine that those are the "blue areas" you are seeing. Most of the famous and iconic places of New York are in Manhattan. Manhattan includes Wall Street, Times Square, Central Park, the Empire State Building and other skyscrapers, the United Nations, Broadway and its theaters, the Metropolitan Museum of Art, and so forth, are all in Manhattan. Manhattan Island is connected to the other boroughs by a number of big bridges and some tunnels. The bridges are long. There are pedestrian walks on some but not others. Pedestrians can walk across the Brooklyn Bridge, but there is no way to walk across the long bridges that cross the Hudson River to New Jersey.

Yikes, I don't recommend it! I don't know Queens very well except for JFK (airport), but you go through highways and bridges to get to Manhattan, and drivers here are pretty aggressive, so I don't trust them to respect bike traffic. Technically, you can take your bike on the subway, but there are restrictions during rush hour on how many cyclists can bring their bikes per (subway) car, so you're better off going off hours.