On our Namadgi expedition today, I mentioned that I hadn't done Shanahan yet. So, mtbikeroz, RexTrex, and I decided to have go (although they own and have logged it already, respectively). I decided to take the bike while they walked up. As mentioned in the description, the gradient is gentle. However, on a mountainbike trying to get up on the steps, things are sort of exhausting. So, I pushed up part of the trail.
After having admired the view at GZ (and, of course logged), I could then demonstrate the superiority of a mountainbike. It was pure pleasure riding down the single trail to the car park and it took only a fraction of walking down.
Thanks for the cache & thanks for the company - Fogg