I have only heard stories about this ride, but it sounds pretty crazy. There is a mass of riders from all walks of life that make their way from the fountain by the Space Theater in Balboa Park through a route that takes you to Downtown, Mission Bay, North Park, etc...
Most riders commit acts and create their own paths that don't really seem legal, except that the cops are guiding the way half the time. Sounds like a blast. I am going to check it out, and I hope you will join me.
See you out there,
P.S. I think we should carpool/caravan down there. How about meeting at the park and ride at 78 and 5 (Technically, it might be W. Vista Way and 5) - When you come to the end of 78, go through the light and make the first right, then the next right (I think) will take you into the parking lot.
P.S.S. If you can take an extra rider, or you need a rid, just put it in your rsvp.