In many places the streams have carved incredibly deep narrow gorges from the limestone. Although it was mostly rideable (in first gear) the going was slow due to the many fallen branches, tricky stream crossings and the dehydrating heat. Along one cliff Jonathan's front wheel suddenly slipped off the narrow track. He fell four metres - then slid the same again before getting a decent grip of a solitary flax bush about 40 metres above the bottom of the gorge. He climbed back up OK, but we had to use a rope to haul his bike up to the track.