Upper Mesa Falls, Targhee National Forest, Idaho.
I just got back from my annual summer vacation where this time, I got some particularly good photos of these falls, thanks to a decent camera. They are a hidden jewel of the Greater Yellowstone area and I never leave without a visit. According to a plaque on site, the falls “are part of the Henrys Fork of the Snake River. It is approximately 114 feet big [tall] and 200 feet wide. The average volume of water flowing over the falls varies between 600 and 1,500 cubic feet per second. This equates to 387 million to 967 million gallons per day.”
I’ve put a panorama that shows more of the gorge on my Flickr account. There’s a link through the side bar.