There are still places in Patagonia where a fishing week feels less like a program and more like a discovery. Aysén is one of them.. The Río Simpson runs through one of the most beautiful corridors of Chilean Patagonia, between Coyhaique and Puerto Aysén. It is a river of movement, structure and changing light: fast runs, soft edges, deep pools, wind, forest, rock and the kind of silence that makes every cast feel more precise.