Every river has its iconic photo. The Colorado River you could argue it’s Horseshoe Bend. Merced River, it’s probably the image looking upstream at the Yosemite valley. Middle Fork of the Salmon, the straightaway section in Impassable Canyon. You know the one.
For the Green River, it’s going to be Steamboat Rock. It’s at a beautiful confluence and as you round the bend it gets more and more defined.