Not sure about a rafts point of view but we ran it right at 4K last year. Osterizer is meaty (but it goes in a kayak), the hole that backs it up looks really ugly, the time between Osterizer and Snake Pit is short due to the speed of the water (so have a game plan), Snake Pit has all kinds of nasty holes all over it. At 4K the boof over the middle looks stellar (not sure you can do it in a raft). Everything is clean till Pour Over City (stay far left). It's after POC that I think it would be the hardest in a raft. At 4K there are some monster sizes holes that stagger the river and require some strong paddling to move between them. There were a few that looked like you could surf a bus in. And you don't really see them till you are on top of them.