Buck Point

From the front parking area (cars should not park in the campground unless they're part of a party of campers with a reserved site) look for the Gorge 400 trailhead, just up the paved road to the left of the bathrooms. Alternately, you can walk up the paved road to the campground, but it's quite a bit longer (and arguably less scenic) than just taking the trail.

The Gorge trail leads around the edge of the Eagle Creek Rec area. It's lovely, shady and mostly flat or moderately graded, but it's a little loud - I-84 is right below you. Veer off Gorge 400 when you come by a campsite (try not to walk through an occupied one) and then walk the road up to campsites 5 and 6, set off up a moderate trail that's somewhat easy to follow, at first. 

The trail switchbacks up away from the campground, gaining elevation steadily. You hike through open forest with twinflower at your feet and mountain hemlock above, though many of the trees near you burned in the Eagle Creek Fire of 2017.

Eventually, you leave the forest for more open slopes; you're nearly to the top. A few BPA (Bonneville Power Administration) powerlines are your destination, along with a view of the Columbia River. But you do need to mount several very tall stairs - the trail here was likely a little more reasonably graded, but lack of use and erosion has rendered this section quite steep. Luckily, it's over soon, and you can enjoy a view of the Columbia River, Bonneville Dam, and the mouth of the Eagle Creek Gorge before heading back down.

Note: Some navigation applications indicate that the trail continues on past this point, but there is nothing more notable, nor a particularly better view than the open area you're in.