Just in case you guys missed it. The "Race To The Rock" was held in Australia in September. Only one finisher. Check out the awesome video which was just release from Cycling Tips
I did about half of the Tasmanian Trail two years ago. It was great, but I wasn't able to complete the route due to time constraints and bush fires at the time. I tried to follow the guide, but it seemed quite out of date in parts and the trail is overgrown and not very well marked - which makes it a great challenge. I plan to go back next year to try and map the complete route with gps. It would make a great route for a multi-day bikepacking race!