I’m not sure if the weather will hold but if it does this seems pretty cool:

“Bike DC is a noncompetitive, community bike ride scheduled for September 27, 2008 in Washington, DC. Hundreds of riders are expected to participate in exploring the history and vitality of the nation’s capital and its many celebrated landmarks. Our 17 mile car-free route is designed to attract experienced riders, novices and families and promote the accessibility of our streets to cyclists.

The principle beneficiary of the event will be the Washington Area Bicyclist Association (WABA).

The ride will begin in the shadow of the US Capital and the White House, on Pennsylvania Avenue. The route includes cycling past many of Washington’s iconic venues from the National Cathedral to the Anacostia River.”