Jackstack is 100% correct.
Mid morning Sat - 1hr mums, dads and kids race/event
Directly after the beginners/casual riders complete - 1 hr for the more capable
Sat night - 2hr night race
Sun morning - 4 hour solo or teams enduro. longer track with increased technical sections.
The best MTB weekend ever. The family loves it. 5 year olds to 75 year olds hit the track. Very low key weekend, heaps of fun. Good track.
2 years ago completed the 4 hour as a team of 5 due night race delaying my T-Bone and refreshing ales into the wee hours of the morning around the campfire.
Last year one of the dads who took his kids ended up buzing around with a dolphin torch duct taped to his helmet and there was a kid with a wind up torch stopping occasionaly to recharge his single digit lumen light set.
Not the olympics- great relaxed weekend with your mates and families.