This was hands-down my favorite part of our Portland vacation. We took a day trip out to the Columbia River looking for the Oneonta Gorge which we had read so much about. It's less a trail and more like a river walk -- until you get to the 20' high jumble of logs wedged between the two tall walls of the slot canyon. We scampered over and then came to viewing distance of the middle waterfall, stopped only by a section of 5' deep water….COLD water. We had more energy (most of us did, anyways), so we took a longer hiking excusion above the slot canyon, across some neat bridges, and along the trail that went behind the waterfall. It's probably like Hawaii -- pictures don't do it justice. Here's a video Gina took.