Originally Posted by Willie 1.5
"The john day being iced over hadn't really crossed my mind."
This comment throws up a bunch of red flags for me. I suspect you may need to do some more research.
Do flowing rivers freeze over when it dips below freezing at night? I suppose if it never came out of the 20s for several days it might freeze solid, but it seems unlikely. *edit* or at least I could see it coming in the weather forecast *edit*
As far as more research. Thats what this thread is about. In everyones opinion, how cold does it really have to be for a slow flowing river to freeze up to the point that rafting isnt possible? Anyone have experience with the john day in winter?