Skoonichuk Falls
Location
Skoonichuk Falls: 45.6046 N, 121.8801 W
USGS Topo: Tanner Butte
Directions
To see this waterfall park at the Eagle Creek trailhead (~1.0 mile past the Bonneville Dam exit off of I-84, only available to eastbound traffic). Follow the trail and continue past Loowit Falls and the High Bridge to a side-trail off to the left, ~3.8 miles from the trailhead. The viewpoint that my distant picture was taken from is closer to the High Bridge and only ~100 feet off of the trail.
Video