3 river systems within, did fd of Urique, will shar advice
I could tell you many details if you want to contact me, 719-221-1824. Paul Zirklebach, Eric Keighan, and I did the first descent of the Rio Urique back in 1990(?). Copper Canyon is so big that, unlike the Grand, it holds three river systems within it's depths. I have many very epic details to share if you are seriously going there. I do highly recommend it. Though you may reserve judgement after learning of potential challeges. Feel free to call. Cheers!