Approximate - nearest available gauge. Use as general reference only.
The river calms to class II+ for half a mile or so. As you pass through a class III rapid with a huge boulder in the middle of the river at the bottom, the river makes a drastic turn to the right and you arrive at T Rex. Make a left to right S- turn between to holes at the top and then run down the center, moving right. You can go all the way right of the ledge, or hit a nice boof flake right in the middle. Don't go left. I have been pinned over there, and I have seen it happen to several other people. It's no fun.