I flew in a 206 turbo out of the middle fork of idaho to McCall. The pilot was an old guy; didn't say much. We poked our nose in several drainages trying to find a clear shot up and over the divide to McCall. He saw a small opening, went for it, and then it slammed shut after it was too late to circle back to the river. After puckering up so violently that I de-upholstered my seat, I started looking at heading/airspeed/horizon, and he firewalled the throttle, watched his horizon, and shot for the moon. Manifold pressure was way up there, and we popped up above the clouds and made our way to McCall. Not a word was spoken. I'm still not sure if I had cause for concern, but losing sight of ground in that country is a bit troubling. The plane struck me as being pretty powerful while flying at 9000+ ft.
