This isn't just one track there are thousands with awesome downhillers and jumps you have to look out for most of these are dirt fire tracks but the downhillers are for toughies (unless you use the brakes) Don't get lost get a map called 'Wombat State Forest 4WD and Trail Bike Tracks' for $12.95 AUS
How to get there:
It is about a 1 hour trip from Melbourne but worth the drive. You can Start of in a place called Bullengarook just out from Gisborne Which is off the Calder Freeway.
Take a friend unless you are 100% sure of yourself and on the weekends watch out for the motorbikes