I ran it in 1996 at about 27,500 at Chili Bar. We figured about 40,000 at Salmon Falls, but that was a guess. We all felt it was technically about Class 3+, but of course some holes would eat a Winnebago. Large trees floating by seemed a bit of a hazard, too.
Swimming in the wrong place could be a very long one too, and it was really big, with waves that changed on the spot like big Co. rivers. It was so big in there at that level, that even though it was technically not too hard, it 'felt' way harder.
This year at 4,800 in the gorge it was very pushy and changeable, but super fun. I would love to see it again super high. there were years when it was 8,000 for weeks, and 4,000 much of the spring. Love those days, and these coming on now.