The last high water made the majority of the Clackamas into a trough. The gradual graidient of the banks are now pretty much gone, and portaging, or lining a craft is much more dificult here. It is dangerous, but entirely do-able. And the slot that appears in low water is pretty much the only route to hit, and you have a lot of stroking to do, to make it through safely. Some places are not as shallow as people think, and the hydraulic pressures created are amazing. I have watched more than a half dozen DB's get turned sideways, in what appeared to be "flats" and fill to the gunnels in 5-7 seconds. Dangerous, sure, but waht part of any river isn't? Scout it, and run it for the first time when the river drops below 2500 CFS.