In May of this year, two Icon company employees flying an A5 made the error that has been the final mistake for too many seaplane, bush, backcountry and mountain pilots. They entered a canyon from the downhill end, starting below the surrounding ridges. By the time they discovered they were in the wrong canyon they didn't have room to either climb over the ridges or make a 180-degree turn. They tried to reverse course, hit a canyon wall and were killed.
This is a companion discussion topic for the original entry at https://www.avweb.com/flight-safety/technique/icons-low-flying-guidelines-a-good-start