Based on: A big day out linking single track sections along the Yarra, Mullum Mullum and Koonung trails. This 80 km loop with a hell of a lot of single track, linked with bike path sections, gravel roads and dirt tracks (and a little bit of bitumen) starts and finishes within a few kilometers of Melbourne's CBD. That's right, there'a a huge singletrack ride starting and finishing close to the CBD of a city with four million people. How cool is that?