when me and a friend went hiking down into it years ago they had resting areas spaced out all the way to the bottom and those areas had phones in them that you could call the rangers to come down and pick you up if you could not hike back up....they would come down with mules to get you and it would cost like 100 bucks per person....and it was only like a mile and a half to the camp ground at the bottom....but it was all up hill going back....going down no problem...they also had signs in the beginning telling you this...