well, we didnt hike out on the road, we hiked out on top of the flumes themselves! it was rediculously scary. at points, the flumes are 100 feet off the ground, they are about 3 feet wide and really old. the top of the flume is made of old wooden planks that were falling apart and rotting, at certain points there were huge gaps in the wood that would allow you to see the massive amount of water being sucked through the flume itself. the worst part was that you had to calculate each step to be a certain distance so you would step on the stable parts of the top so you didnt fall through the rotting wood into the rushing water in the flume. yeah....4 miles of that crap will make you cry like a baby.