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Doable above 350, Maui wave best 1100 to 1400. Eddies start to disappear above 1500. Kick in the pants with 10 ft waves at 3000. When the dam is releasing around 1800 in a big water year, there typically is at least 1000 more from Straight, Rock, Boulder creek and other assorted trickles. Not extremly tough, but no place for weak paddlers at high flows. The river will flood the banks at higher flows making the banks into strainers. If you go past the take out, you will be floating all the way to Green Mountain as it is all private land after the takeout.