I think it was just riding the track. There was a mention of a "3 Lap Challenge" starting at 6:30, but who knows what that meant?
http://www.facebook.com/event.php?eid=262446680452639
We were there riding motos all day and were quite tuckered out at the end of the day, otherwise we'd have ridden too. There were quite a few cyclists there by the time we left at 5pm.
I just wonder when they might be doing it again?