Training sessions specific for the event are offered by a number of Gyms and Personal Trainers. Give a google to find them in your area.
But to start with we suggest you start to get a little fit by just walking around the block - a run in the bush is a good start as most of the track is open paddocks and a little bit of bush to run through.
Get down to your local play ground and start swing and climbing all over the monkey bars.