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The next mile or so is all more or less boat scoutable, depending on your comfort level of doing so. You'll want to look at a couple of horizon lines unless you're with someone who knows the run, but otherwise everthing is good to go until you get to a funnelled, sliding drop with a boof in the center (Mushroom). Call this one a class IV+. It comes about 3/4 of a mile into the gorge.