From the waba.org web site
Join thousands of area commuters for a celebration of bicycling as a clean, fun and healthy way to get to work! Meet up with your neighbors at one of 26 pit stops all over the region, ride into the city with experienced commuter convoys and meet your colleagues at Freedom Plaza. Washington Area Bicyclist Association and Commuter Connections invite you to try bicycling to work as an alternative to solo driving. Help the washington region become a better place to ride. Bike to Work Day is a FREE event and open to all area commuters. There will be raffle prizes, food, drink, and more at all pit stops throughout the region.
Free t-shirts will be available for the first 7,000 registrants who are in attendance at the pit stop they registered for.