Facebook event page
James D. Pfluger Pedestrian and Bicycle Bridge
1250 W Riverside Dr, Austin, Texas 78703
Here's a list of events for upcoming full moon rides.
A specific event will be made for each ride a week or two before the ride happens, but this can be used to remind yourself of them months in advance.
The schedule for upcoming full moon rides can be found at http://cycling.frenzied.us/full-moon-rides
As always, ride at your own risk, having lights on your bike at night is a good idea and it's always prudent to have at least enough equipment to change a flat.