The League of American Bicyclists is trying hard to create a national bike and pedestrian route. http://agreatride.typepad.com/a-great-ride/2010/04/now-is-the-time-to-show-up.html

NOW is the time to support a national cycling infrastructure! Get involved by contacting your Governor and state DOT by sending them an email:
http://capwiz.com/lab/issues/alert/?alertid=14887506&PROCESS=Take+Action

It will only take you a couple of minutes and think how great it would be to have routes throughout the country! It can only lead to safer cycling for us all.