I tyhink my next camera will be one with a built-in GPS, so that I won't have to try and remember exactly where I was when I snapped a shot. I'm pretty sure this is the Madison River on the west side of the park, but I could be wrong.
This is, I think, the Gibbon River, and below is a picture of Gibbon Falls.
And here's one end of the Grand Canyon of Yellowstone. I'll likely have some more of these up later this week.