I know a few people who have run the "falls" around Disney. But they don't have the kind of 4x4 vehicles you can drive on the street. Everyone that does that has to trailer their vehicle because they are extremely modified.
your link doesn't work, i know alot of it is a tough area, but have been told they are lot's of places that mild rigs can play around in. you think it would be to tough for my truck with a rear locker and 35" tires?
been there and watched them play. i have seen several street vehichles climbing around. i have walked it a few times, it is a very dangerous place to play. i have seen several rigs roll a long ways through the rocks. the rocks are extremely porous and very rough on tires, tennis shoes, and bare feet. as nomo said, most of the rigs that do the run are not streetable. it is lots of fun to watch, but would get very expensive real quick.
Have watched them a few times through the my fingers. (They scare me to death). My husband went down below the dam last weekend on his 4 wheeler. Just make sure you don't drive the non street legal vehicles on the road. I have seen them pulling them over left and right after a meet. Apparently the hypos didn't have anything better to do that day.