1. Oneonta Gorge
E Historic Columbia River Hwy; Mt. Hood National Forest
One of the coolest and shortest hikes in the Gorge has two swimming options: either 1) hike through the cracks in the rocks, wade chest-deep for a quarter mile, and pop out in a gigantic swimming hole w/ cliff-diving and waterfalls, or 2) be sneaky and trudge under the scary-ass holes underneath the I-84 bridge and emerge on a sandy, secluded beach right on the Columbia, which has been proven to have considerably less hepatitis than the Willamette.