Hellyer Park Velodrome
I am a regular spectator at this velodrome, where my son races. If you get a chance to visit, I recommend Saturday mornings if you want to ride and Friday nights during the Summer if you want to watch races. The velodrome site has a full calendar. Races can be serious, but everything else is low-key, relaxed, and inexpensive. For many more pictures try the tag "Hellyer" at Flickr.
ADT Event Center Velodrome