For those interested there is now a website on the <http://www.keptrack.org.au/> Kep Track (Mundaring to Northam). The track is 75 km long and the estimated time to complete is 6.5 hours at 12 km/h riding a bike. You can also ride it on horseback or walk it. I personally wouldn't bother walking as I think you can do much better walks in WA in the same time and think it would better as a good day ride.
