I don't know about you, but I'm not ready to pack up my boat quite yet so this past Sunday I went with friends and we took two boats up 20 mile as far as we could go then went for a hike.
Water's pretty skinny, with debree at nearly every turn once you get back a few bends (tree's, stumps and rocks in many parts of the river). It was much different this time around compared to when we ran it in July. That said, it always has great views and there are still some snow caves left that make for good photo opportunities.
If your looking for a late season run and are not worried about possibly getting a small dent in your boat there's still some water to run - just try to stay in the channel.