Hey samlu, check out the website for the newly formed You Yangs MTB inc,
http://www.youyangsmtbinc.com.au/ If you want to join up, you can drop into my shop and fill out a membership form, we are in Latrobe Tce (Beretta's BIke Hub). If you've got any questions feel free to ask or check up on the board in the shop, we've got all the shuttle days and race dates listed.
There are shuttle days, some easier races coming up and the state round is being hosted at the Youies also.
THe first state round is at Eildon around 16 or 17 October, check out tis site for the right information
http://www.vicdhseries.com/.
You should also check out Mike Kidds I-Ride shuttle days down at Apollo Bay during summer, sick tracks and heaps of great crew to ride with.
Hope that helps, cheers Paul.