From SFBC:
Come out and explore the Blue Greenway, a 13-mile greenway/waterway network on San Francisco’s Southern Waterfront, and help shape a premier bicycle route for the city's southeast. The ride will stop at 6 locations along the Blue Greenway to define the vision for bicycle access. Enjoy breathtaking views of the SF bay, celebrate the history of southeast SF, and enjoy a thrilling ride! Hosted by the Neighborhood Parks Council and the SF Bicycle Coalition, the ride is free to all (and there will be a raffle!) -- reserve your spot or learn more information at the NPC website or call 415-621-3260.