Google Maps now offers biking directions! and extensive bike trail data for the US. Google explains that “Biking directions can help you find a convenient and efficient route that makes use of dedicated bike trails or lanes and avoids hills whenever possible. To find biking directions, select "Bicycling" from the drop-down menu when you do a directions search.” Also, added information about bike trails, lanes and recommended roads directly onto the map. This can help you get a better sense of your route, or let you find trails nearby for a recreational ride. When you're zoomed into a city, click on "More" button at top of the map to turn on "Bicycling” layer. You'll see three types of lines appear on the map: Dark green indicates a dedicated bike-only trail; Light green indicates a dedicated bike lane along a road; Dashed green indicates roads that are designated as preferred for bicycling, but without dedicated lanes.