Hey Tim, what'd ya think about that road leading to the dam? Ain't that a scenic stretch of forest.
Regarding Boyer and Winslow, I've made two treks in there with a friend. We hiked a long ways up and down those creeks, and never found even a 2 foot drop
Not saying they don't exist, just that where they're labeled on a certain site, there's no falls or sign of drops anywhere. The land is relatively flat as well. Whiskey Falls exists however, but its not real scenic, more just a cascade.
On the North Fork, you were wise to turn around when u did. Once you reach the orange ribbon at the second quarry, the real adventure begins. It's quite steep and thick in places, and the last 80+ ft is aided by a rope on the muddy slope. More info Here
Funny story about that rope. Last year my father asked me if I'd been to a waterfall on the North Fork of the Clackamas. I said yes. He asked if I found a rope on the slope leading to the base of the falls. I said yes. He said that back in 1984, his dad was working at the Oregon City Paper mill and was given rope on occasion, big rope. Well in '84 my dad took that big black rope down with him and tied it to a tree, so him and a his fishing friends could get back out of there easier. It's still there 18 years later being used by kayakers and waterfall gurus.