This is Mesa Canyon of the Upper San Juan, below the town of Pagosa Springs. It's not a particularly difficult stretch, but at 2000 CFS it is a great play run, or for me, a whitewater open boater.
Unfortunately I had to skip running the Animas in Durango as it was too high in this great water year. I think the local word is 'carnage', which can also be fun - perhaps this old man is too proud.
