This was truly a memorable trip since it was new to all of us. We left the cars at Porcupine Creek at the start of the old road and crossed the bridge following Porcupine Creek until Fox Creek came in from the north. The first couple of kilometres were typical of a river bed and we had to cross the creek a couple of times but managed not to get wet. As we hiked along the creeks, we were astounded at the spectacular canyon walls that towered above us which was breath taking and worth the effort.
As Daffern says, the "terrain is continuously stoney, the gradient is never steep and there's no scrambling" however, this changed somewhat when we climbed out of the canyon onto Boundary Ridge . Before attempting the ridge we had lunch in the trees and found some shelter from the wind. It was a steep climb to Boundary Ridge.