I was out hiking at Tumalo Falls a few days ago after work, and found my eye drawn to the largeish cliffs looming to the right above the road on the drive in. (No picture, unfortunately.)
They don't appear to be listed on MP, but a bit of googleing suggests that there's something called "Cougar Cliffs" or "Cougar Bluff" in the Tumalo Falls area, which had a now-deleted MP page at some point in the past. Is that the rock I was looking at? If so, what's it like? Decent climbing? Chossy death? Solid, but with access issues that preclude it from being listed on MP?
I understand it's decent climbing. There's a multi-pitch trad line up it that goes at 5.9 I hear. Haven't been on it yet though. I also hear there are a number of bolted routes out there. Someone's got some beta. Keep looking.