Placed on the tunnel gully track, on a section flanked by pine trees and at a particularly undulating part of the track... hence the name.
If you time it right on the bike, you can use the downhill sections to power yourself up the following inclines, all the while imagining you are on some sort of rollercoaster ride...
The cache is a small screw top plastic container, with room for a log only, please bring your own pen.