This was one of the easiest in terms of completing the grid - or, to put it another way, I managed to do it. Judging by the thread others found the word search in the endgame straightforward. I'm still stuck despite spending a lot of time on the web reading articles on the intrepid pair.
I have one of the rivers: the name of a State whose Senator behaved disgracefully last week, and a very prominent range. The other two rivers elude me. Is anyone else in the same boat (or canoe) or should I go back to dot-to-dot?