After lower Yellowstone Falls, I feel Gibbon Falls is the prettiest falls in Yellowstone that can be viewed from a paved road. The problem is it's hard to photograph. After many attempts, I finally managed to get a pleasing shot of it as an ultra wide panorama. This was taken in early June..
To get the shot you see above I dispensed with my tripod and kicked the ISO of my 5D up to 400. I climbed over the wall and lay on my stomach on a flat boulder. I went with a 17mm focal length and overlapped three shots. I feel the result gives you a feel for what it's like to be at the site, high above the canyon. I do not recommend you try this for yourself unless you have someone belaying you with a climbing rope. I am a climber and still fairly sure footed. One misstep here and its down 150 feet!.