When it comes to city bicyclists and city sidewalks, it is not only often dangerous to bike on a city sidewalk, but can be illegal as well. City to city, laws differ. So while cities may consider sidewalk biking illegal, others may not. If you’re considering biking on the sidewalk, check your city’s laws first. But regardless of legality, recognize that cycling on sidewalks may pose danger to bicyclists, pedestrians, and even drivers.