Google maps is great, but I usually use satellite to verify as much as I can. Bike routes are put in by people like you and me. Although you do need someone to verify your change, it still ends up with paths that are sometimes hard core mountain bike. I do wish they could differentiate between commuter maps and mountain bike maps.

This is a new tool from Strava that shows where their user bike. It is great for finding new bike routes. Again, use it with a grain of salt. Just because someone rides a path every Sunday morning, doesn’t mean the road will be useful for a commute during rush hour. Still, I get lots of great ideas of where to go from using this:

http://labs.strava.com/heatmap/#13/-...8383/gray/bike